Manga / Prison School

Being one of the few boys in a female-majority school is surely a paradise... right?

Prison School (監獄学園 / "Kangoku Gakuen") is a 2011-2017 seinen series by Akira Hiramoto (of Me and the Devil Blues fame).

Hachimitsu Private Academy is an elite all-girls boarding school infamous for its draconian rules and harsh penal code. When five boys — Kiyoshi Fujino, Takehito "Gakuto" Morokuzu, Shingo Wakamoto, Jouji "Joe" Nezo and Reiji "Andre" Andou — are admitted as part of a new co-ed program, the girls seem to give them the cold shoulder. Unbeknown to them, the notorious and powerful "Underground Student Council" of Hachimitsu— misandric president Mari Kurihara, sadistic vice-president Meiko Shiraki, and cute but abusive secretary Hana Midorikawa— have issued an edict forbidding any communication between the genders.

Soon enough, the boys find themselves in trouble when they are caught peeping on the girls' baths. They are sentenced to one month of jail time in a giant prison inexplicably located at the centre of the campus, where they will undergo a "rehabilitation program" devised by the Underground Student Council. Can the boys survive a month of physical, mental and emotional abuse without losing their minds?

The series received an anime adaptation by J.C. Staff for the Summer 2015 season, and has received a live-action series in October 2015. Weekly publications for the manga ended on Dec 25, 2017, making a total of 277 chapters. An epilogue chapter for the series was published in April 2018 coinciding with the release of the final volume.

---

Prison School provide examples of:

Warning! Late Arrival Spoilers before the final story arc (Kiyoshi's Love Confession) are left unmarked!

Tropes present across the entire series

• Absurdly Powerful Student Council: The main purpose of the Underground Student Council is to enforce the school's rules against male/female interaction on school grounds. They're allowed to lock up any student caught breaking those rules in the school's fully functional prison that they run with almost no supervision from the school facility. A lot of the abuse they put their prisoners through violates school rules, but lack of oversight makes it easy to get away with it.
  • The School also had the real-life, normal variant of the Student Council, and aren't relevant to the plot until the Underground Student Council's crimes was exposed and had to be sent to the prison themselves. By absorbing the Underground Student Council's duties into their existing ones, the Student Council became even more powerful than the Underground Student Council had ever demonstrated, and began calling themselves the "Aboveground Student Council".
• Aborted Arc: The wet t-shirt contest. Despite the boys pushing forwards for just that one event, not only does it never get shown, but it's also the least important part of the whole plot. Only at the very end of the series, in the extra epilogue chapter, do the boys go to see it. The audience never does, though.
• Adaptational Attractiveness: In the manga, the boys are initially rather scrawny, but in the anime, they all have toned muscles and six-pack abs underneath their prison garbs (except for Joe and Andre).
• All Men Are Perverts: All the recurring male characters are huge perverts (including the otherwise kind-hearted Kiyoshi). The boys are only in this mess because they wanted to peep in the girls' baths and the chairman has an ass fetish. Despite most of their stay at the school being hellish, the boys still pledge to remain there because at the end of the yearly school trip there's going to be a wet t-shirt contest.
• Aloof Dark-Haired Girl: Mari has long dark hair, is usually calm in most situations (in some cases eerily so), and is popular among the other students.
• Arc Symbol: If you had one thing that captured Kiyoshi and Hana's relationship, it would be pee. Her whole fixation on Kiyoshi only started because he caught her whizzing outside, some of their closest moments came about by one or the other peeing on each other, and Kiyoshi being exposed for all the perverted things he's done over the series by Hana is capped off with him peeing on himself while Hana watches.
• Arc Villain:
  • Mari, in the 1st story arc, is leading the charge to make the boy's stay in prison as hellish as possible and later on she tries to get them expelled.
  • Kate, in the 2nd and 3rd story arc, is using the new powers of the Official Student Council to get revenge on Mari.
  • Hana, in the final story arc where she opposes Kiyoshi's love confession to Chiyo for her own personal reasons.
• Art Evolution:
  • In the early chapters, Kiyoshi is drawn as incredibly plain while Gakuto and Shingo are both goofy-looking weirdos. By the most recent chapters, Kiyoshi and Shingo are both Bishōnen and Gakuto only becomes weird looking for gags. In general, with the exception of Andre, all of the boys go from fairly cartoonish-looking to being as realistically drawn as the girls.
  • All the 3 girls in the USC looked slightly different in their initial appearance in the manga. In particular, Meiko was initially drawn with more realistic body proportions before Flanderization sets in and her breasts grew to a ridiculous size. Hana was drawn without her pants under her short skirt in her first couple of appearances, and her character design was relatively plain compared to her currently more adorable appearance.
• Bait-and-Switch: This series makes regular use of this trope.
  • Played straight:
    • Hana tried to force Kiyoshi to pee in front of her only to get his urine ending up in her mouth... No, it was actually Meiko drinking water from a tap. Hana was still drenched wet from Kiyoshi's urine though.
    • Gakuto's atonement for humiliating Mari appeared to be Ass Shove, courtesy of Meiko. It was revealed that the "dildo" was actually a shaver meant to make him bald.
    • Hana took out a pair of scissors saying that she is going to have her revenge on Kiyoshi for making her "lose her virginity", sounds like she is going to castrate him? Actually, she was only using the scissors to cut open a water bottle so that Kiyoshi can pee inside of it.
    • Risa refused to let Kiyoshi leave the prisoners' classroom to the bathroom. As a result, Kiyoshi couldn't help it but pee in the classroom itself, shocking Mari who was sitting next to him... Turned out that the "urine leaking" was actually the tea which Kiyoshi secretly poured onto the floor and thus pretending that he lost his bladder control.
    • When Kiyoshi and Hana were naked under the blankets to resolve their pee-related feud, Chiyo snapped away one of the blankets, as if she knew the pair was there. It turned out that she was only trying to tidy up the room.
    • Gakuto finds himself in a box playing a guessing game with a very forward Bitch-senpai and it appears that she had him finger her... the next chapter reveals that his hand was actually under her armpit.
    • Chiyo asked Hana whether she liked "him". Hana thought Chiyo found out about her crush on Kiyoshi. Turned out Chiyo was merely referring to the frog that Hana was staring at.
    • After Kiyoshi made his love confession to Chiyo, she bowed down to Kiyoshi for what appeared to be an apology due to her rejecting him. It turned out that she was apologizing to Hana instead - the feeling Chiyo had for Kiyoshi was mutual. Not that it resulted in a happy ending...
  • Subverted:
    • Kiyoshi having to hide the phone which Mari had accidentally dropped onto the floor. Since the series uses this trope quite often, the reader would have anticipated that the bulge on Kiyoshi's pants is meant to look like an erection but it would actually be the phone he was hiding. It was revealed that the bulge IS his erection!
• Belligerent Sexual Tension: As the story goes on Kiyoshi and Hana's animosity basically devolves into a series of erotic staredowns.
  Hana: (demands Kiyoshi pretend to kiss her for less unflattering blackmail pictures)
  Kiyoshi: (very flushed) Well maybe I really will kiss you! What then?
  Hana: (equally flushed) Touch me and I'll rip your arm off!
  Kiyoshi: (getting closer) Only one arm? You said just one right?
  Hana: (softly) ...You don't have the balls.
  Reader: ...
• Between My Legs: There are a number of panels focused squarely on Meiko's upper thighs even as she's talking.
• Broken Pedestal:
  • In the present story, Mari has very little respect for her father, the Chairman, though flashbacks reveal that she used to admire him. It's unexplained what exactly caused a rift in their relationship but it's heavily implied to be because of the chairman's perverted habits.
  • The USC used to be admired by most of the student body, even having a few fangirls. However, their reputation took a massive hit after their cruelty to the boys were exposed, forcing them to serve time. To make matters worse the newly empowered official Student Council is trying to get them in more trouble to damage their reputation further. The outcome of their damaged reputation was obvious during the Calvary competition, with almost every student taking the side of the official Student Council.
• Butt-Monkey:
  • During the first story arc, Gakuto is frequently on the receiving end on a lot of slapstick. He gets punished the most of all the boys, sometimes for things he isn't even a part of. For the sake of getting his Guan Yu action figure he shits his pants and gets in enough trouble to get his long hair shaved. The sad part is that later on he ends up having to smash the figure.
  • Whenever she's around Kiyoshi, Hana gets a lot of hell. She's been caught urinating outside, got peed on, faints when his erect penis accidentally touches her crotch (By her own definition that made her lost her virginity), and her last attempt at revenge gave the boys an opportunity to get the evidence that brings down the USC.
  • Kiyoshi took over the Butt-Monkey status from Gakuto from the 2nd story arc onwards, by frequently being on the receiving end of violence from Mari and Hana and also ending up in ridiculous situations such as needing to expose his genitals to the whole school (Which earned him his pariah status after the Sports Festival).
• Cannot Talk to Women: All of the male students turn into creepy, sweating messes in the face of women. They're getting slightly better at it over time, but they still get ridiculously anxious even when speaking with their respective love interests.
• Chekhov's Gun
  • Kiyoshi's recollection of the Chairman burying his Porn Stash early in the first arc becomes a key to overturning the boys' impending expulsion, when he uses it as part of his appeal, blackmailing him into a private audience with the boys with the intention of buying them enough time to gather more evidence of the USC's misconduct.
  • There's a few panels showing some newspapers in Kate's bag. Chiyo gets a glance at them as she's greeting Kate but doesn't think much of it at the time. Then after Meiko apparently burnt a tree with a nest of crow chicks, Chiyo recalls the contents of the newspaper and realized that Kate had planned all these.
  • That single panel of Hana's phone falling out of her pocket when Kiyoshi made her faint by tongue kissing her? Turns out the camera was on at the time and captured the whole thing. Cue blackmail from Hana much later when the two are alone again.
• Clothing Damage:
  • Invoked by Mari, who gives Meiko a tight but more modest school uniform. Meiko thinks this is her actual punishment for the incident with Gakuto's action figure, but later, when trying to goad Andre to go through the prison's fence (which would count as a breakout), the uniform gives out and tears, which excites Andre enough to charge through the fence.
  • Happens to Meiko again, to her Spy Catsuit and her panties, all on separate occasions. A pattern emerges.
  • Happened to a shy Meiko's middle school years when her efforts to hide her developing breasts failed.
  • Kate does this to Mari and Meiko during the Sports Festival, exposing their nipples to the entire school (Including the boys) in a ploy to make them forfeit the competition.
• The Comically Serious: Prison School might as well be "The Comically Serious: The Anime''. The incredibly detailed and relatively realistic art is completely contrasted with the sheer ridiculousness of the story. Despite this, every single character treats the conflict with complete seriousness, adding another layer to the contrast.
• Companion Cube: As part of their escape plan, Kiyoshi and Mari tell the other boys to make a plastic bottle rocket. Instead, they end up making a rocket out of plastic bottles, which they become very fond of. After it's scrapped and recycled by the official Student Council, they build a shrine to "PBR-sama" who they treat as an actual deity they pray to.
• Covert Pervert:
  • Despite his stern appearance, the Chairman has a fetish for asses (specifically, of the Brazilian kind), something he tries to hide from his daughter Mari and fails at miserably on multiple occasions.
  • Kiyoshi's inner monologue consistently showed that he is this.
  • As much as he is a Nice Guy, Kiyoshi also proved himself to be among the biggest perverts in Hachimitsu after he manages to buy the boys time to gather evidence of the USC's misconduct from the Chairman with an impassioned speech about why asses are better than breasts.
  • A drooling Kate clearly enjoys watching Kiyoshi and Mari's Suck Out the Poison incident far beyond the pleasures of revenge.
• Custom Uniform of Sexy: Meiko wears her uniform with most of her shirt unbuttoned showing off her cleavage and then some, an extremely small skirt that reveals her panties anytime she bends her legs, thigh-high stockings and stiletto heeled boots.
• Cute Clumsy Girl: Mitsuko, who seems to have the universe conspire toward her panties falling on the floor.
• Despair Event Horizon:
  • Kiyoshi's Bad Date with Chiyo leads him so close to the horizon that on his way home he stands dangerously close to the tracks while waiting for his train, reminiscent of something someone suicidal would do.
  • Happened again when he becomes the school's new pariah and Chiyo appeared to be part of that crowd.
• Despite the Plan: The boys' schemes often unravel due to unforeseen developments, but thanks to a combination of improvisation and recklessness, they sometimes make it through.
• Determinator:
  • When it comes to his precious Guan Yu action figure, no price is too high for Gakuto... even if it means shitting his pants in class and ruining his chances to get a girlfriend to make farting sounds to cover Kiyoshi's escape through the restrooms. Later on, he purposefully gets in trouble with Mari to get his long hair cut so Kiyoshi can use the hair as a wig for his breakout plan.
  • Hana will stop at nothing to get her full revenge on Kiyoshi, no matter how badly things always backfire.
• Disaster Dominoes: Mitsuko's clumsiness tends to set off such improbably unlucky chain reactions that the boys secretly nickname her the "Rube Goldberg of Klutzes".
• "Do It Yourself" Theme Tune: The opening and ending themes are sung in-character by Hiroshi Kamiya (Kiyoshi), Katsuyuki Konishi (Gakuto), Kenichi Suzumura (Shingo), Daisuke Namikawa (Joe) and Kazuyuki Okitsu (Andre).
• Double Standard: Abuse, Female on Male: The male students undergoing physical abuse are usually played for laughs. Not so much when the female students are going through the same thing, as seen in the 2nd story arc - And they weren't even abused that badly compared to the boys.
• Dramatic Irony: A lot of the series' humor comes from utilizing this trope combining with Serious Business. A memorable example would be the scene where the boys are discussing how much suffering Kiyoshi is undergoing at the hands of Hana... Which cuts to Kiyoshi making out with her.
• Early-Installment Weirdness: Mari was The Beastmaster of the crows in the first half of the first story arc. She and the rest of the cast completely forgot about this ability of hers by the end of the first story arc.
• Enemy Mine:
  • Kiyoshi and Mari initially start a begrudging alliance after the latter was imprisoned following the downfall of the USC. Then they later become genuine friends, with some Ship Tease in the mix.
  • The boys and the imprisoned USC who committed numerous human rights violations against the boys in the first place, all because Kate's new administration replaced the USC's previous Wet T-shirt Contest with a clamming event.
• Everybody Was Kung-Fu Fighting: Because the school has a strong focus on physical education, most of the female cast know some form of martial art.
  • Mari and Kate: Aikido
  • Meiko: Judo
  • Hana: Karate
  • Chiyo: Sumo
  • Risa: Kendo
• Everyone Calls Him "Barkeep":
  • The Chairman's full name has not been revealed and the only reason why we know his last name is because we know the full names of his daughters, Mari and Chiyo.
  • Similarly, while we know Mari's and Meiko's full name every character but Chiyo, who calls Mari "big sister" and Meiko "Meiko-chan", refers to them as the president and vice president.
• Excrement Statement: In the Clinic Hana forces Kiyoshi to lie on his stomach on a bed so she can urinate on him as payback. She doesn't get a chance to do so since they have to go under the bed and hide when Chiyo walks in. She goes on to repeat this demand with every future attempt at revenge to similar failure. Until Chapter 177 when she finally succeeds.
• Face–Heel Turn:
  • Andre "re-conditioned" into helping the ASC in the sports festival story arc. After the story arc ended, he returned to the company of the USC and the boys again.
  • Hana betrayed the USC to join the ASC after she had finished serving her time in the prison. It was all an act though, since she was playing the part of a mole.
• Face of a Thug:
  • Shingo is noted to have the look of a delinquent. Mostly likely because of his blonde slicked back hair.
  • Everything about Risa's early characterisation seems to indicate a personality that fully fits her thug-like appearance but Andre at least thinks she's a lot nicer at heart. A little too nice for his tastes in fact.
• The Faceless: We are never shown the top portion of Jo's face since he almost always has on his hoodie and in the rare instances that he doesn't have it on there's always something else distorting his face, like suds when he's bathing or bandages covering his head and Scary Shiny Glasses when he was disguised as Gakuto.
• Faint in Shock:
  • Kiyoshi and Hana hide under a bed in the school nurse's room, both naked from the waist down. The proximity to Hana causes Kiyoshi to get an involuntary erection that directly touches Hana's bare privates. Hana not only passes out from embarrassment right then and there, but passes out so deep and hard that she wakes up on the bed much later on with zero recollection of the incident.
  • Hana later attempts revenge on Kiyoshi by stealing his first kiss so that he can't share it with Chiyo. Kiyoshi turns it around when he realizes that Hana is extremely innocent when it comes to romance, and deliberately deepens the kiss into full-on making out. The shock of being kissed with tongue for the first time in her life (by someone she secretly harbors feelings for, no less) straight-up scrambles her mind, shutting her brain down completely as she goes limp in his arms.
  • Later, Hana faints again when accidentally catching a glimpse of Kiyoshi's bare privates.
  • When Kiyoshi mistakenly believes that he has been bitten on the butt by a venomous snake, he panickedly pulls down his pants and begs Meiko to suck the venom out in an act of desperation. The sudden shock of Kiyoshi's naked backside being shoved right in front of her face leaves Meiko dead unconscious for the rest of the evening.
  • Mari faints after it's revealed that the plastic blade that was in her food was found on the floor of a restroom.
  • Andre passes out when two different dommes command him to serve them at the same time and he can't decide which one to obey.
• Foil:
  • Risa, the Vice-President of the ASC has the Face of a Thug but she's nicer than her thug-like appearance indicates, and hence struggles as a dominatrix in Andre's eyes. In comparison, Meiko, the Vice-President of the USC is more attractive-looking but she's also much crueler and abusive, and hence makes a great dominatrix in Andre's eyes.
• Foreshadowing:
  • Revelation of Mari's bad fashion sense in the 3rd story arc, was hinted back in the 2nd story arc when Andre was taunting Meiko.
  • During the 1st story arc, Mari tried to convince Kiyoshi to sign the school withdrawal form, saying that students will treat him like a pariah when they found out he was cross-dressing. That is exactly what happened in the 4th story arc.
  • Remember Mari's poignant response asking Kiyoshi to take her out to Yakiniku after the Sports Festival? Her response was so because she never actually had any intention to do so.
• Form-Fitting Wardrobe:
  • The female uniforms the USC have to wear are impossibly form fitting. Chapter 89 opens with at illustration of Meiko wearing one and it looks painted on as it conforms to her breasts, nipples and labia. It has the same effect on Mari and Hana, though to a lesser degree since they're not as voluptuous. Kate states that Mitsuko "accidentally" got the wrong sizes for them, but if anything, the uniforms are actually an exact fit.
  • Meiko's catsuit might as well be a second skin. It conforms to every curve of her body.
• Four-Leaf Clover: Hana has the boys collect them in her introductory chapter, and the USC was also required to find one in order for them to continue playing in the Sports Festival.
• Friend to Bugs: Jo likes insects, even owning an ant farm with individually named ants.
• Gainax Ending: The last chapter ended with Chiyo becoming the new President of the USC, with little explanation. Additionally, the "epic" epilogue chapter that the author had promised, turned out to be nothing more than a few panels of the 5 boys in their prison uniforms dreaming about the Wet T-Shirts contest. The author did not bother to explain the significance or background behind those few panels.
• Gendered Outfit: The male prison outfits are the classic black and white horizontal striped jumpsuit. The female version has the same color pattern but consist of a very tight top that shows off their midriff] tight cropped capri pants, and lower-cut loafers worn without socks that show more of their ankles.
  • Bizarrely subverted later on when Kiyoshi returns to prison and has to wear the same thing.
• Girl Next Door: Chiyo, Kiyoshi's crush who sits in front of him in class. She's kind, friendly, the first girl to want to talk to any of the boys, and like Kiyoshi, is a huge fan of sumo-wrestling. Despite being the school chairman's daughter she is very down to earth and despite her sister's antagonistic relationship with Kiyoshi and the boys, she helps the latter when she can.
• Going Commando:
  • The vice prez rips her panties when they get caught on a doorknob due to too many finger pull ups but she just puts them in her pocket and gets on with her patrol. Of course, in this manga there was no way she wouldn't end up flashing someone. (Kiyoshi, who realises that he can never let her find out or he's dead.)
  • Accidental underwear loss is a frequent outcome of Mitsuko's clumsiness. (Usually just her own, but on one memorable occasion spreading to everyone in the room.)
  • Due to various events Hana ends up switching her underwear with Kiyoshi's shortly before competing in the obstacle course, quickly realizes she can't run properly like that and devises a plan to switch them back in the middle of the race, only for complications to arise that result in her finishing the race with no underwear on at all.
• Gonk: All the characters in the series are rather pretty-looking, in a typical anime style, with the exception of Andre who is large, has an egg shaped body, a face that is way too small for the rest of his head, and over-sized Budha-like earlobes.
• Grand Finale: The 1st, 3rd, and final story arc's ending is written in a way that can be played as this trope.
  • 1st story arc: The boys managed to turn tables on the Underground Student Council with a full revelation of the latter's DTO conspiracy and were freed from prison.
  • 3rd story arc: The conflict between the USC and the ASC ended in the destruction of the prison. Nothing Is the Same Anymore.
  • 4th story arc: As rushed as the ending was, it puts a definite end to 3 months' worth of attempts made by Kiyoshi to date Chiyo, which has been serving as his background motivation throughout all the story arcs.
• Hidden Depths: Many of the characters' behavior and personality are often inverted to serve as comedic or dramatic characterization.
  • Mari appears rather cold with an ominous air about her, but cares for those she considers her friends and takes responsibility for her own misdeeds.
  • Meiko acts high and mighty towards her prisoners but goes fully submissive towards Mari.
  • Hana dresses conservatively and is shown to have a rather innocent mind... But is one of the biggest perverts in the story., if not outright the biggest.
  • Gakuto talks like as if he had a massive ego, but he is among the nicest and most selfless guys in the series, and in fact willing to sacrifice his dignity to help his friends.
  • Andre is a Gentle Giant... And a hardcore masochist.
  • Shingo acts betrayed by Kiyoshi's prison breakout... and goes forth to enjoy his time outside by betraying his fellow prison mates.
• Hormone-Addled Teenager: The boys, who are all sex-obsessed, perverted morons. Some of the girls also exhibit such behaviors, even exceeding the boys on occasion.
• Hypocrite: Mari, Meiko, and Hana of the USC are consistently portrayed this way throughout the entire series. They are responsible for enforcing rules that forbade illicit inter-gender relations, which by their definition includes even dating and socializing. However, to prevent their council from getting disbanded, Mari is willing to team up with the boys and approved of Kiyoshi dating Chiyo. Despite the boys obviously showing that they enjoy her BDSM-style physical abuse, Meiko continued her punishment methods. Last but not least, Hana repeatedly harasses Kiyoshi and also went on a date with him, all done in secret and full awareness that her actions breaks the rules she was supposed to enforce.
• I Kiss Your Foot:
  • During the boys first day in prison Meiko orders Andre to lick her boots for shielding Jo from one of her beatings. She relents when Kiyoshi points out that she's taking things too far. Oddly enough Andre gets angry at Kiyoshi since he actually likes being bullied by Meiko.
  • During the cavalry battle, Meiko and Risa both compete for Andre's attention by offering their shoes for him to lick. As Andre is tempted by both, their offers escalate: Meiko spits on her shoe to add to its appeal to Andre, whereas Risa offers to let him lick both her shoes. Meiko then verbally berates Andre, knowing he enjoys it. In retaliation, Risa kicks off both her shoes and dangles her bare feet in front of Andre's face. The boys watching the scene unfold note that Risa has deliberately chosen to not wear socks in her sneakers that day (to a sports festival, when even Hana, who on any other day would never wear socks, has on a pair of no-show socks in her shoes) just to make her feet as stinky and drenched in sweat as possible because she knows Andre would like it.
• In-Series Nickname: All five boys have "codenames" that they're referred as almost exclusively.
  • Kiyoshi Fujino: "Kiyoshi"
  • Shingo Wakamoto: "Shingo"
  • Takehito Morokuzu: "Gakuto"
  • Jouji Nezo: "Jo"
  • Reiji Andou: "Andre"
• Institutional Apparel: Classic black and white prisoner attire.
• Lens Flare Censor: In the anime (TV version). The BD version was largely uncensored.
• Little Miss Badass:
  • Hana is the shortest and least endowed member of the USC. She's also a black belt in Karate and can beat the living daylights out of the boys.
  • After a group of Kate's lackeys try to force her into a Shameful Strip, it's revealed that Chiyo's knowledge of Sumo isn't restricted to simply appreciating it.
  • Surprisingly, Kate turns out to be proficient enough at Aikido that Chiyo finds herself unable to throw her.
• Loving Bully:
  • Kate towards Mari.
  • Hana towards Kiyoshi too, though the bullying started well before the attraction.
• Male Gaze: There are numerous shots and close-ups of breasts, butts, and crotches. Especially with Meiko, who has a lot of panels with her dialogue or inner monologues also being centered on those areas.
• Manly Tears: Frequently played for laughs as part of the Serious Business nature of the series.
• Ms. Fanservice: Despite the setting being a school with over 1000 female students and more than half the cast being female, the vast majority of the fanservice comes from Meiko, mainly in the form of Male Gaze. The chapters where she's not around tend to have little to no fanservice.
• Never My Fault: Hana never once blames herself for the mishaps that occur to her, always choosing to focus all her misplaced rage on Kiyoshi whom she gradually starts harboring a crush on.
• Noodle Incident: An incident twenty years before the present story led to the Underground Student Council imposing harsh punishment for any student caught socializing with males. The specifics of that incident are never explained.
• Nonuniform Uniform: The USC members wear their uniforms differently from the other female students. Mari wears Proper Tights with a Skirt (she's the school's chairman's daughter after all), Meiko has her Custom Uniform of Sexy, and Hana wears jersey pants under her skirt as well as no socks in her shoes. Among the ASC members, Kate also goes without socks (though she later adds some stockings into her wardrobe), whereas Risa forgoes a necktie and wears combat boots and no-show socks instead of the standard loafers with knee-high socks.
• Nosebleed: Hana gets so overwhelmed when she forces Kiyoshi to make out with her that she gets a nosebleed and faints. She gets another one after some sexually charged hand holding too.
• Ouroboros: A sexualized motif from the second major story arc onwards.
  • Mari and Kiyoshi got into a position reminiscent of this trope so as to suck snake venom out from each other.
  • Mari and Kate's lesbian sex act, which also happens to be the series' first actual sex scene.
  • Kiyoshi and Hana's urolagnia scene at the start of the Sports Festival.
  • Gakuto and Bitch's cavorting eventually put them into a 69-like position.
• Overly-Nervous Flop Sweat: Aside from sweating a lot when she works out, Meiko breaks out in constant sweat attacks when she thinks things aren't coming along as they should be, or when she's failed the President.
• Poor Communication Kills:
  • Kiyoshi lied to Chiyo that he could leave school on the weekend and broke out to go on a date with her. Unfortunately, when she finds her school uniform in his backpack she assumes the worst and runs out on the date before he could explain anything. Later after she hears that Kiyoshi could be expelled she decides it wasn't fair of her to not allow Kiyoshi to explain himself. After he does, the two mend their relationship.
  • After Chiyo stumbles on documents for OBE, she tries to alert Kiyoshi by arranging the pieces of her board game to spell out a warning. As Meiko escorts the boys back to their cells Kiyoshi spots the warning. However, he read it from the wrong angle so the message was gibberish to him. When he later writes the message for Gakuto to see, the latter is able to figure out that it's a warning but by the time they realise this, OBE is too far ahead for them to stop it.
  • Kiyoshi and Mari have enormous difficulty in communicating to their allies outside of the prison the supplies they require to break out, something that ends up costing them several days of valuable preparation time.
  • Intentionally or unintentionally invoked by Hana, when she tore up the note Chiyo gave to Kiyoshi. The message was originally meant for Chiyo telling Kiyoshi to take care and remember Tanabata. Kiyoshi put the broken pieces together and interpreted it as Chiyo telling him to kill himself.
• Pop-Culture Pun Episode Title: A lot of the Chapter names are either movie titles like Taxi Driver, or swap around one word for another like Broke Back Prison.
• Potty Emergency:
  • Hana has one in Chapter 6/Episode 2 after drinking too much dandelion tea. Trouble follows due to an Accidental Pervert situation, leading her to get payback below.
  • Invoked by Hana when she forces Kiyoshi to drink tea that will make him want to use the restroom. That way they can be alone and she can get her payback. Kiyoshi is aware of this and tries to hold it in so he doesn't have to ask for permission to use the restroom. Unfortunately, Gakuto sees him trembling and asks for him.
  • Meiko suffers one in Chapter 78 when she can't get the zipper on her Spy Catsuit undone. She ends up having to tear the whole thing off and use the toilet nude.
  • When Shingo, Jo, and Gakuto end up locked in their room, a great deal of trouble is had finding a container when the latter really has to pee.
  • Happened to Kiyoshi again during the Love Confession story arc... ended up peeing on both Hana (again) and Chiyo.
• The Power of Friendship: Ultimately what the series is about. The first arc revolves around each of the boys sacrificing what they want the most in order to support each other, and the second involves them doing the same with the Underground Student Council.
• Prim and Proper Bun: Meiko has her hair in a bun at all times. She's shown to be very strict and formal, and she does not hesitate to use her whips on the boys for any kind of misbehavior.
• Raging Stiffie:
  • Kiyoshi gets ones after Hana forces him under a bed in the nurse's room to hide from Chiyo who just walked in to see Kiyoshi. Kiyoshi, who's extremely close to Hana gets an erection, despite his best efforts not to. It ends up touching Hana right between her legs which causes her to faint.
  • Subverted with Gakuto during the breakout attempt. The female students think he has a boner, when it's really just the speakers that came with his mp3 player.
  • A recurring gag features Kiyoshi frequently being forced to hide his erection during his second prison term with Meiko and Mari. The fact that all three are wearing such tight revealing clothing doesn't help.
• Revenge
  • Kate's primary motivation is revenge against Mari for humiliating her in elementary school even though she was the bully at the time (see Break the Haughty).
  • Hana wants revenge on Kiyoshi for seeing her pee outside. Then double revenge for both that and what happened when her previous attempt at revenge went wrong. Then triple revenge when that backfired. You get the idea. In chapter 177, she finally succeeds, though by this point in time, Hana is less concerned about feelings of revenge and is only really going through with it since it's her personal creed to follow through with a promise, no matter the circumstances. She even comforts and kisses Kiyoshi when he's devastated about what she put him through.
• Rummage Sale Reject: As it turns out, outside of school Mari has a pretty terrible fashion sense and her taste in clothing seems to be a bunch of random shirts tackily thrown together. Averted in the final arc.
• Sanity Slippage:
  • Hana was fairly Cute and Psycho to begin with, but the terrible things that happen to her over the course of the story do not do wonders for her sanity.
  • Gakuto breaks when his plan fails and the boys' expulsion looks inevitable.
  • Andre basically loses his mind when denied punishment from the vice president.
  • Invoked by Kiyoshi when he starts Gaslighting Risa with perversion to make her guard slip.
• Screw the Rules, I Make Them!:
  • The USC are supposed to enforce the school rules but they don't have any issues breaking numerous of them in their attempt to get the boys expelled.
  • After absorbing the duties of the newly imprisoned USC, the ASC became more powerful than either student council had ever been on their own. Left unchecked, they were able to openly spread propaganda and turn the entire student body against the USC, and avoided any official justice in framing the USC for burning a tree, violating privacy by putting cameras in the prison's bathing area, mistreatment of a mentally regressed Meiko, and getting bullies to attack Chiyo.
• Serious Business: Most of the series' humour revolves around this really. It's only an ordinary school but the concept of the prison is treated completely seriously by all involved.
  • Breaking the bro code and stopping the other boys from peeping on girls, missing a date or what have you, is absolutely unacceptable and apparently "punishable by death".
  • There is literally no amount of crap Gakuto is not willing to take if it means obtaining his beloved Guan Yu figurine.
  • The only way the chairman will consider giving the boys the time they need to prove their innocence is if they answer this question "What do you like more, Tits or Asses?". Considering the chairman has an ass fetish the answer is obvious, explaining why is the difficult part.
  • Andre develops an entire business model "Andreconomics" around investing abuse onto the Vice President for greater punishment later.
• Shout-Out: So many that they now have their own page.
• A Simple Plan: From breaking out of prison to cavalry competitions, plans never go as smoothly as intended. It is often thanks to the main characters' quick thinking and improvisation that the end-goal was achieved.
• Something Else Also Rises:
  • As things between Mari and Kate start to heat up while making out on Kate's bed, the manga cuts to an image of a double ouroboros - two snakes biting each other's tails. As later panels reveal, yep, they did.
  • The story has a running gag of using a Medusa's face to represent Hana's nethers whenever Kiyoshi accidentally sees them. (Because it turns him to stone.)
• Spinoff: There's a side series titled Fukukaichou Ganbaru that follows Meiko's daily life when she's not working in the prison.
• Sympathy for the Devil: In spite of everything Hana puts him through, Kiyoshi apologizes to her for playing with her feelings to get the evidence needed to take down the USC. Her response is to kick him so hard she injured his arm and almost punches him in the face while he's down (Mari takes the hit). Yet even after that he still feels sorry for her, stating that he deserved it. Part of the reason the USC was able to get off so lightly was because he refused to press charges against Hana.
• Too Kinky to Torture : Andre loves being abused by women, especially if the abuse is from Meiko. He willingly takes punishment for some of the boys in a few cases, and slowly withers away when he stops receiving punishment.
• Unusual Euphemism: Hana and Kiyoshi's use of "mushroom" and "medusa" to refer to each others genitals.
• Unwitting Instigator of Doom: In retrospect, Mari was indirectly responsible for all the mess that occurred - Enforcing the rules forbidding inter-gender relations, which led to the boys being tempted into the peeping incident and subsequently leading the other members of the USC in a failed conspiracy to kick the boys out. Subsequent development of events are such that the school prison was destroyed and both the Underground Student Council and Aboveground Student Council are rendered powerless. This realization made her decide to leave her Underground Student Council position and go on a student exchange.
• Vapor Wear: Meiko doesn't wear a bra under her school uniform, which shows since it's open down to her stomach. Still, other than a few instances, she manages to avoid a lot of nipslips.
• Verbal Tic: The Chairman's manner of speaking almost always involves emphasizing a syllable or word at the end of his...sentences. This also tends to be punctuated with a dramatic turn of his head every time he does...this.
• Villainous Breakdown:
  • Hana went through this 3 times in the first major story arc:
    • When Hana's memories of having Kiyoshi accidentally touch her with an erection in the nurse's room return, she snaps so hard that she tries to barge into the Chairman's office with a large knife to get him. Had Meiko not managed to stop her, things would have taken a very bad turn indeed.
    • Arguably worse however is the one she later has in the guardroom because, unlike the emotional but still rebellious rage she'd shown previously, this time she breaks down sobbing when the humiliation of her and Kiyoshi's Accidental Pervert moments finally reaches her limit.
    • After the USC plot to expel the boys is revealed to the chairman, Hana softly asks Kiyoshi if he had unlocked the back entrance of the prison while she was unconscious, which was, ironically, the result of a kiss she had forced on him. Kiyoshi regretfully confirms this saying he took advantage of the weakness in her heart and apologizes. In spite of his apology Hana charges at him in a furious rage, kicking him so hard she injured the arm he used to block the kick. She almost punches him in the face while he's on the floor but ends up punching Mari instead, who had jumped in to shield Kiyoshi as anymore abuse to him in front of the chairman would have gotten Hana in more trouble.
  • Kate freaks out hard when Mari reveals the truth of her Honey Trap.
  • Hana again appears to be going through this right at the end of the series' penultimate chapter when her ploy to ruin Kiyoshi's love confession to Chiyo failed.
• Wardrobe Malfunction: Meiko, on multiple occasions, wears clothes that are way too tight for her curvaceous figure and end up giving out and tearing at the most inopportune moments.
  • Mari gives her a suffocatingly tight but more modest school uniform. Meiko thinks this is her actual punishment for the incident with Gakuto's action figure but later, when trying to goad Andre to go through the prison's fence, the uniform gives out and tears which excites Andre enough to charge through the fence just as Mari planned.
  • The backpants of Mari's prison uniform tear as she's trying to quickly complete her task of digging a large hole.
  • In a flashback chapter, Meiko's Sarashi audibly tears when she stands up too fast in class to answer a teacher's question.
• Webcomic Time: The Prison School manga chapters are released on a weekly basis with occasional skips in-between. The completed major story arcs are:
  • Boys' Imprisonment - 81 chapters covering events that take place over a span of two months.
  • USC's Imprisonment - 85 chapters covering events that take place over a span of less than 3 weeks.
  • Sports Festival - 74 chapters covering events that take place over a span of a single day.
  • Kiyoshi's Love Confession - 37 chapters covering events that take place over a span of a week.
• Wrong Genre Savvy: Chiyo has a tendency to get the wrong end of the stick where tropes are concerned, mistaking a Great Escape plot as plans for a Surprise Party, Hana's quest for Revenge as Training from Hell in the mountains and Hana's panties in Kiyoshi's room as Gakuto cross-dressing.

Boys' Imprisonment story arc

• Accidental Hero: Kiyoshi accidentally humiliates Hana twice, once for witnessing her peeing (which ends the work for the day) and another for peeing on her (making her avoid guard duty and giving Kiyoshi and Gakuto a window of opportunity to break out of prison).
• Accidental Pervert: Though he is a massive Covert Pervert, most of the sexual situations Kiyoshi keeps getting into with Hana are always by accident. At least until Hana starts forcing him into those types of situations for revenge.
• Art Shift: In the anime, when Gakuto is explaining his plans, the art sometimes shifts to lego-mation.
• Ass Shove: On two separate occasions during the first arc, Kiyoshi has gotten a pointy object lodged up his ass.
  • On the first instance, he gets pierced with Meiko's stiletto after she slips on her own sweat after doing squats over an opening of a sewer drain in which Kiyoshi was crawling around as training for his breakout; he didn't even notice how badly he bled until Shingo points it out to Meiko when she asked why Kiyoshi was taking too long in the restroom (it was part of his plan), explaining that he has hemorrhoids.
  • On the second instance, he is accidentally stabbed by Joe after he tackles the latter out of charging at Mari with a shiv as revenge for his ants apparently being killed by her crows. He downplays the injury and blames it on his hemorrhoids lest Joe get into further trouble.
  • Subverted with Gakuto. After a string of "accidents" that ended with him pulling down Mari's skirt, Gakuto goes to Meiko to apologize. She puts on a glove, and pulls an object from a drawer that's mosaiced out. It's later revealed that it was just hair clippers and Gakuto's atonement was that he had his hair shaved.
• Bad Date: Kiyoshi's date with Chiyo goes well until he decides to go to the restroom. At that moment Chiyo accidentally spills water on his bag. Thinking he has a cellphone in it, she opens it, out only to find her uniform (which Kiyoshi unknowingly stole from the laundry services van for his disguise). When he comes back, she calls him disgusting and runs off.
• Bait the Dog: The first time Hana is introduced to the boys she comes off as cheerful and friendly and she asks them to collect four leaf clovers for a good cause. However it doesn't take long for the boys to find out that she's just as cruel as Meiko when she kicks Shingo in the head for not finding any.
• Batman Gambit:
  • After Kiyoshi's breakout, Mari decides that the boys are too dangerous to stay in Hachimitsu and thus devises "Danshi Taigaku (Boys' Expulsion) Operation" ("DTO"; translated as "Destroy Testicles Operation" in the Funimation dub) to manipulate the boys into getting into more trouble and eliciting two more breakouts to make them eligible for expulsion.
    • They exploit Shingo's wavering loyalties by offering him a deal to squeal on his co-inmates in exchange for certain perks such as free time. During one such period he meets Anzu, who is secretly tasked with seducing him into a movie date and altering his watch to trick him into coming in late. It works, though barely, after Anzu had a change of heart and warned him of what she had done.
    • They deliberately pushed Joe's Berserk Button by making it seem like Mari's crows were eating his ants, and not allowing him to save them, driving him into nearly killing Mari with a branch. Had Kiyoshi not shoved him away, in the process accidentally getting stabbed in the ass, he would've landed in further trouble.
    • They take advantage of Andre's extreme masochism and obsession with Meiko by not punishing him and have Meiko wear more modest clothes. Denied of titillation, he goes lunatic. Later on they lead him outside alone and Meiko, who's just beyond the barbwire fence, promises him punishment if he comes to her. This prompts him to break through the fence, made possible by deliberately weakening the wires, and since he's outside the prison it's considered another breakout.
  • Kiyoshi pulls one on Meiko when she brings the boys their withdrawal forms for them to sign. They return the signed forms, along with a letter of appeal meant for the Chairman. On the way Meiko tears the letter in anger over Gakuto not finishing the food she prepared for him (grasshoppers on rice). Much to the shock of the USC, the Chairman actually requests a private audience with the boys, where it is revealed that Kiyoshi actually wrote his "appeal" on his withdrawal form (it's actually a blackmail, using his memory of the Chairman burying his Porn Stash), knowing that Meiko would be so preoccupied with the bogus appeal she wouldn't even bother checking the rest of the documents.
• The Beastmaster: Mari has a flock of crows under her control that she's able to use for things like surveillance to enforce her rule about not talking to the boys and to attack people. This superhuman ability of hers was silently written out halfway in this story arc.
• Blackmail: Shingo wants to stop being the USC spy after what they did to Joe, but Meiko warns him that if he quits then she'll tell the rest of the boys that he's been selling them out.
• Blind Without 'Em: Chiyo's vision is apparently so bad that, whenever she takes off her contacts for the bath, she mistakes Kiyoshi for her friend Mayumi.
• Blue-and-Orange Morality: All Hana is concerned about is being "fair". She repeatedly attempts to bully Kiyoshi into either watching him pee or to pee on him, because he did the same to her, albeit by accident.
• The Cavalry: The Laundryman, as well as being a Chekhov's Gunman, manages to get Shingo back to school in time, after he's been sabotaged. Shingo still doesn't get back into prison in time, though.
• Clock Discrepancy: During Shingo's movie date with Anzu she sets his watch thirty minutes behind so he would be late getting back to school. By the time she had a change of heart and she warns him, he has only five minutes to get back.
• Clingy Costume: Meiko wears an extremely tight Spy Catsuit to patrol the school grounds at night, but when she tries to take it off to use the restroom the zipper gets stuck. She ends up having to tear the zipper off and use the toilet nude.
• Co-Dragons: Meiko and Hana serve as such for Mari. They spend the most time with the boys since they're the prison's guards.
• Contrived Clumsiness: Gakuto accidentally pulls down Mari's skirt, but later it's revealed that he did it on purpose. He knew that he would have to be punished for it, so he asks Meiko to shave off his hair. He then gives the clippings to Kiyoshi to make a wig for his disguise.
• Cruel Mercy: After the incident with Gakuto's action figure Meiko begs Mari to punish her. Mari refuses to do so and tells Meiko it's not her fault but she says it in a backhanded way by saying it's her fault for trusting Meiko to handle the situation. Despite Mari's merciful response Meiko notes that by her not punishing her she can't atone for her actions so in a way Mari is still punishing her.
• Cut Apart: When Kiyoshi accidentally urinates on Hana, the next panel is a close-up of liquid falling into someone's mouth. The panel after that pans out to reveal that it's Meiko drinking water from a tap.
• Department of Redundancy Department: Mari's plan to get the boys expelled is dubbed "Operation DTO", with O standing for Operation. Meiko sees this, but is conflicted about potentially making her look like a fool. When Hana points it out however, Mari nonchalantly claims that it was a Secret Test of Character to see if they could catch her mistake.
• Destroy the Evidence: After DTO is completed, the USC destroys all documents of the plan. However, they're unaware that the files they can be recovered. Knowing this, the boys plan to recover the files in the Disciplinary Office and give them to the Chairman to prove that the USC framed them.
• Disguised in Drag: Kiyoshi's backup breakout plan involved him walking out the front of school wearing the female school uniform and a wig made from Gakuto's hair. It works so well he even managed to fool Mari on his way out.
• Distracted by the Sexy:
  • Twice the boys gawk at female students when they're supposed to be working, and both times Meiko punishes them for it.
  • The otherwise clear-minded Kiyoshi's greatest weakness is this. For example, he loses his arm wrestling match with Meiko after a lengthy struggle after he got mesmerized at the sight of her nipslip, and later nearly compromises the boys' final attempt to overturn their expulsion after getting an eyeful of Hana's junk.
• Disproportionate Retribution: The entire Peeping Tom incident leads to the five boys being forced to commit slave labor, live in a prison, get physically and mentally abused to the point of bleeding, and plotted against for expulsion.
• Easy Amnesia: When Kiyoshi's involuntary erection accidentally presses against Hana's bare privates as they're both hiding under the bed in the school nurse's room, Hana passes out from shock and embarrassment right then and there into a faint so deep that it causes her to spend the next several days with zero recollection of the incident.
• Familial Reveal: Despite not getting caught getting out of and back into the school, the USC still discover that Kiyoshi broke out and he's confronted by Mari who has evidence of it. During the date, unaware that Kiyoshi wasn't allowed to leave the school on weekends, Chiyo took pictures of them together with her cellphone and sent them to her older sister and father. Who, much to Kiyoshi's horror, are revealed to be Mari and the Chairman, respectively.
• Fetishized Abuser: Meiko punishes the boys a lot and provides most of the fanservice for the series. There are numerous cases of her doing both at the same time like when she whips Kiyoshi in the butt and Gakuto's groin, while sitting on Gakuto's face. For at least first couple days of their sentence all of the boys actually like being abused by her because she's attractive, and they get to see her panties while she disciplines them.
• Great Escape: Different from most cases of this trope Kiyoshi's breakout plan involves him sneaking out and back into the prison for his date with Chiyo. While he's gone Gakuto could tell Meiko that he's in the restroom, and if she goes to check he can use the remote for his speakers he placed in the stall to play the clip of him crapping his pants to make it seem like Kiyoshi is in the stall.
• Heel–Face Turn: Anzu, after hearing how Shingo sold out his friends to spend time with her. She quickly tells him the trap that the USC have set up for him and later joins Chiyo in helping the boys get out of being expelled.
• Hellhole Prison: The prison cells are very dirty, the boys have to do a lot of hard labor and Meiko and Hana punish them liberally. Despite all this Kiyoshi notes that it's only taken a few days for the boys to get used to their prison life. They still take their classes, though through a monitor, and they get the same food as the rest of the students. Unfortunately, it goes back to being a Hellhole Prison after Kiyoshi's breakout as the student council are much more strict and start manipulating the boys into getting themselves in trouble.
• Heroic BSoD:
  • Gakuto is devastated when he and Kiyoshi discover that someone had fixed the hole in the wall Kiyoshi had made, ruining their breakout plan and for Gakuto this means he pooped his pants for nothing. When Kiyoshi hears him crying during bedtime it gives him the resolve to come up with a new plan.
  • Kiyoshi, after his date with Chiyo. The date ends badly with Chiyo thinking he's a creep when she finds her uniform in his bag, the USC finds out he broke out, and he gets everyone's prison time extended by a month causing his friends hate him. He's easily convinced by Mari to fill out a withdrawal form, which he almost does until Chiyo stops him.
  • After the boys' first attempt at recovering the documents of OBE fails, Kiyoshi's notes that they're not even sad about it, just broken. They continue their routine just waiting for their inevitable expulsion. The sole exception is Gakuto, who Kiyoshi describes as being not just broken, but destroyed. Specifically, he rambles constantly about impossible escape plans.
• Hit Me, Dammit!: After falling for the USC's trap and revealing how he sold his friends out, Shingo offers them a chance to punch him as payback. They all decline except for Kiyoshi, who takes him up on his offer since Shingo punched him for his breakout but ends up simply giving him a light tap on the shoulder, at first anyway. (see Restrained Revenge)
• Hope Spot:
  • After Anzu tells him about the USC's trap for him Shingo runs to the school with only minutes left until he's late and it's considered another breakout. He nearly gets hit by a car on his way. Fortunately the driver is nice enough to drive him the rest of the way. He arrives in front of the prison with 30 seconds to open the door and get inside. Unfortunately, Mari seemed to have planned for a situation like this and had the rest of the boys change the door to a sliding one while he was away. Shingo is unable to open the door in time which gives the USC their third breakout.
  • Gakuto is able to sneak back in the recreation room after Meiko defeats all the boys so they assume that he was able to recover the files about OBE. Unfortunately, he informs them that he was only able to install the program to recover the files. When he heard Andre screaming during his match he quickly rushed back. At that point the boys' expulsions seemed to be inevitable.
• Hypocrisy Nod: During his date with Anzu. Shingo notices two boys throwing sand at another boy. When he goes to confront them about it the two boys tell him they're throwing sand at the third boy for breaking their rule about not talking to girls. Shingo yells at them saying that even the third boy broke their rule they should forgive him because he's their friend. After the boys leave Shingo is sadden by the realization of how hypocritical that was coming from him since he's yet to forgive Kiyoshi.
• I Ate WHAT?!: Mari faints after it's revealed that the plastic blade that was in her food was found on the floor of a restroom.
• Inelegant Blubbering: Hana's face gets all red and puffy when she cries from embarrassment at Kiyoshi witnessing her peeing.
• Insane Troll Logic: Kiyoshi's answer to the chairman about why asses are better than boobs is crazy but correct, at least to the chairman. When man walked on all fours all he could see were women's asses, but as man evolved, the ass was no longer in front view and boobs took their place. So in the end, boobs are just fake asses and if one has to choose between the original and a fake, they should obviously choose the original.
  • While Kiyoshi did come up with the answer all by himself and does sound ridiculous in context, in real life his explanation is actually one of the possibilities theorized by evolutionary biologists on the origin of human female breasts. In the end this particular instance of Insane Troll Logic is actually subverted.
• I Thought That Was: Anzu gets two tickets for her and Shingo to watch The Grapes of Wrath which is a very subdued film about farming conditions during the Great Depression, but the title causes the two to mistake it for something akin to Attack of the Killer Tomatoes! ...Or at least Shingo did, Anzu knew exactly what the movie was and used it to bore Shingo asleep to mess with his sense of time so he'd be late for his curfew.
• Just Testing You: Mari claimed her mistake in terming the conspiracy as "Plan OBE" was meant to test Hana, but really, it can also be interpreted as this trope.
• Laser-Guided Karma: While Meiko gets Gakuto's action figure broken (though definitely not on the terms she wanted), the figure ends up getting the last laugh. Shingo, who is unaware of what happened since he was just coming back from running errands, comes back and identifies a piece of the figure as the plastic blade he found on the restroom floor and gave to Meiko. The same blade Meiko accidentally threw in food she made for Mari and ended up in Mari's mouth. Meiko tries to hide where blade was found out of fear of Mari's reaction but thanks to Shingo, Mari finds out and faints at the revelation.
• Leave Behind a Pistol: The USC convince Kiyoshi to leave the school by filling out a withdrawal form. Mari notes that rumors about Kiyoshi crossdressing have already spread so if he stays in at the school he'll mostly be treated like a freak.
  • Meiko gives the boys withdrawal forms to fill out so they don't have to continue waiting for the school staff to decide on their expulsion, which at the time seemed inevitable.
• Loophole Abuse: The USC sentence Kiyoshi with expulsion for his breakout. However, as noted by Meiko, the USC have no authority to expel students but students can request to be withdrawn from the school by filling out a withdrawal form. So Mari tries to prod Kiyoshi into filling one out. He almost does until Chiyo stops him.
• Love-Interest Traitor: Anzu was working for the USC all along. Her mission was to get close to Shingo, invite him to watch a movie with her and set his watch thirty minutes behind so he'd be late coming back to school which would count as a breakout. She gets a change of heart at the last minute when Shingo reveals all he's done to be with her.
• Major Injury Underreaction: When Kiyoshi gets stabbed in the butt for the second time he downplays the severity of his injury and simply blames it on his hemorrhoids despite clearly having a piece of a branch lodged up his profusely bleeding ass.
• Marshmallow Heaven: When Chiyo cradles Kiyoshi's head to protect him from Meiko she ends up pressing his head against her breasts. She lets go after she realizes what she's doing. Later Kiyoshi notes how wonderful the experience was and it adds to his resolve not to withdraw from the school.
• Misplaced Retribution: Whenever Mari finds the chairman's Porn Stash she usually takes out her frustration on the boys.
  • When she finds that he's been on porn sites she retracts the boys' weekend privileges, which is why Kiyoshi decided to break out for his date with Chiyo.
  • When he accidentally spills his collection of dirty pictures in front of her she informs him that she's going to start becoming more strict on the boys.
  • Later, despite his best effort to hide his "ass" ergonomic mousepad, she spots it and in her inner-monologue she decides to intensify her plans to get the boys expelled.
• Mistaken for Gay:
  • Kiyoshi and Gakuto get mistaken as couple by the rest of the boys. They kept their breakout plan to themselves so from the perspective of the other boys the two are spending an unusual amount of time together.
  • Shingo walks in on the two in the showers and sees what he thinks are the two having sex, really it was just Gakuto kneeling down to get his bar of soap and Kiyoshi helping him up when he slipped. The rest of the boys blame Kiyoshi's "hemorrhoids" and Gakuto's crapping his pants on them having sex.
  • When Kiyoshi tells Gakuto about his second breakout plan he proclaims that he's going to become a girl, meaning he's going to disguise himself as a female student to sneak out from the front of the school, but the other three interpret it as he's going to be the bottom in their relationship.
• One-Sided Arm-Wrestling: All five boys challenge Meiko to arm wrestling matches and all but Andre last only a couple of seconds. She even throws Jo to the wall.
• Operation: [Blank]: The USC devise a scheme to get the boys expelled, Operation Boys Expulsion, or as they like to refer to it, OBE.
• Peer Pressure Makes You Evil: Kiyoshi's slightly more sympathetic status is initially established by having him be reluctant to commit the boy's original peeping crime before being pressured into it.
• Pet the Dog: While Meiko has been the cruelest of the USC to the boys, she is the only one to do something nice for them by offering them a last meal the day before their expulsion should have been decided on.
• Playing Nice for Now: Hana does not want anyone knowing about her urinating outside. The only person that knows is Kiyoshi who spotted her doing so. While she treats him like a she treats the other boys, she constantly looks for opportunities for the two to be alone she can get revenge on him.
• Porn Stash: The chairman has a collection of photos of women's butts. After it's seen by Mari twice he decides to bury it outside the school. It takes him to two tries get rid of it for good. The second time he uses cement so he won't be able to dig them back up like last time.
  • Of course even with his memorial photos gone he still has the porn sites he frequents and his ass mouse pad.
• Post-Kiss Catatonia: Hana after Kiyoshi turns her kiss back on her and deepens it into full-on making out. In fact, the catatonia part only comes after she wakes up from the dead faint that the kiss sent her into.
• Reasonable Authority Figure: The chairman. Though he lets his daughter handle disciplining the boys, he urges her to be as lenient as possible. She usually disregards that request. After the USC tricks the boys into breaking out enough times to get expelled, he's still reluctant to expel them and tries to give them enough time to stop their expulsions. He doesn't hold back when he ends up having to punish his own daughter for what was done against the boys, albeit with reluctance.
• Restrained Revenge: Played straight and averted after Plan OBE is done. Shingo offers the boys a chance to hit him and Kiyoshi takes him up on his offer as payback for Shingo hitting him last time. However, Kiyoshi simply taps him on the shoulder, telling him that all of them have made mistakes and they all forgive him. At least until Shingo tells the boys about how got to see Anzu's bra and a nip slip. Then Kiyoshi punches him hard and the rest of the boys beat the crap out of him out of jealously. They do forgive him right after though.
• Sacred First Kiss: Kiyoshi get his first kiss stolen by Hana in the warden's room. Her reason is to deny Kiyoshi the opportunity to share his first kiss with his crush. Like most of her attempts at revenge this one ends up backfiring on her. Kiyoshi realizes from the stiffness of her kiss that she's extremely innocent when it comes to romance and overwhelms her by turning the kiss into a make out session which causes her to faint.
• Sadistic Choice: Poor Gakuto has found himself between a rock and a hard place twice.
  • For part of their breakout plan to work, Kiyoshi and Gakuto need an mp3 of someone taking a crap to make it seem like Kiyoshi's using the restroom while he's actually on his date with Chiyo. The only chance they have get the mp3 during their prison sentence is the time that they have a combined class with female students in the computer lab where they will have computer and internet access. Unfortunately, they can't find any such mp3 on the web and the only way they're getting one is to use the microphone on Gakuto's headphones to record one of themselves crapping their pants. Kiyoshi can't do it since Chiyo's also in the class so Gakuto decides to take the bullet. Kiyoshi begs him not to, since doing so will assuredly ruin any chances of him getting a girlfriend but Gakuto reasons that not being able to buy the Guan Yu action figure which only comes out once every four years is worse than not being able to get a girlfriend for three years and does it anyway as Kiyoshi sheds Manly Tears.
  • After finding Gakuto's Guan Yu action figure, the next day Meiko has the boys lines up outside, brings out the toy and slowly starts breaking it in front of them. She won't stop until one of them claims the toy. This leaves Gakuto with two options. Watch as his prized possession is slowly broken in front him or claim the toy, which, since Meiko knew the only day the toy was sold was on the day Kiyoshi broke out, would also mean admitting to have aided Kiyoshi and get the boy's jail time extended even further.
    • He decides to Take a Third Option by diving for the toy, looking at it one last time and smashing it to pieces to prove to Meiko it doesn't belong to him.
• Secret Test of Character: When Mari first tells Meiko about her intention to get the boys expelled she dubs her scheme "plan OBE". Since the O in OBE stands for operation "plan" and "operation" are overlapping, Meiko knows this but can't decide whether to correct Mari. Mari ends up correcting herself. Later on she discusses OBE with Hana and calls it plan OBE again. Hana instantly corrects her. Mari claimed that she did this to see if Hana still had a sharp mind after her leave of absence.
• Sexy Soaked Shirt: Occurs constantly with the USC vice-president because her abnormally high metabolism causes her to sweat gallons almost anytime she gets nervous or does any physical activity, making her shirt completely see-through. Since she doesn't wear a bra underneath it's quite revealing.
• Shared Family Quirks: In the first story arc, Chiyo, Mari and the Chairman have each stated on separate occasions an odd belief that anyone who loves sumo/crows/asses cannot be a bad person.
• Shy Bladder: In a restroom stall, Hana demands Kiyoshi to urinate while she watches as payback for Kiyoshi seeing her urinating outside. Kiyoshi tells her he can't with her watching so she tries to physically force him, only to end up slipping on the floor and for Kiyoshi to unintentionally relieve himself on her.
• Spanner in the Works: Kiyoshi and Gakuto's first break out plan depended on a hole Kiyoshi had spent days making in one of the walls surrounding the prison. Unfortunately, the chairman, who was burying his dirty pictures for the second time using cement happens to find the hole and fills it up himself, unknowingly ruining the two former's plans.
• Spiteful Spit: Meiko has spit on Gakuto and Andre on multiple occasions to punish them. Andre, being a masochist, licks her spit the first time.
• Spit-Trail Kiss: Let's just say that the infamous kiss between Kiyoshi and Hana was taken up to eleven in the final episode of the first season. Viewers see Kiyoshi and Hana breathing heavily, their bodies shaking violently from the force of the kissing, their tongues moving back and forth (from a POV inside Hana's mouth) and swapping copious amounts of spit... you get the idea.
• Spoof Aesop: Having chosen to resign himself to the prison, Kiyoshi proudly reflects on his actions... but all he thinks about is how Chiyo smells good and how her boobs are soft.
• Spy Catsuit: Meiko's latex stealth outfit.
• The Stool Pigeon: The USC make a deal with Shingo. In exchange for getting information about his friends he gets good food, the USC no longer punishes him, and he gets to leave school under the guise that he's running errands for the USC.
• Stop, or I Shoot Myself!: Chiyo threatens Mari that if she ever tries to get Kiyoshi to quit school again she'll turn in her withdrawal form and leave the school too.
• Sure, Let's Go with That: Kiyoshi does not have hemorrhoids but nor does he have a good lie when Meiko asks him why he was in the restroom for so long. Shingo, who sees that Kiyoshi is bleeding from his butt assumes it's hemorrhoids and tells Meiko. As embarrassing as it is Kiyoshi decides to go with that.
• We Need a Distraction:
  • Gakuto antagonizes the cleaning man as a distraction so Kiyoshi can sneak in the female laundry room and steal a female uniform.
  • The USC has Shingo strike up a conversation with Jo to move him away from his ants so Mari's crows can attack them.
  • All the boys challenge Meiko to arm wrestling matches to distract her while Gakuto steals her keys and goes to the wardens room to recover the files for OBE.
• What the Hell, Hero?: Kiyoshi gets punched and yelled at by Shingo for getting the boys' sentence extended by a month for selfishly breaking out to go on a date with Chiyo.
• Workout Fanservice: Any time Meiko works out since she usually does her workouts in her revealing school uniform, her large breasts tend to flop around a lot, she sweats so much it makes her clothes transparent and as with most of her panels, the focus tends to be on her breasts and crotch.
• Wrongful Accusation Insurance: Kiyoshi mentions that although Gakuto broke out of prison and Chiyo assisted him, neither of them will receive any punishment since their efforts lead to the reveal of wrongdoing by the USC.
• Your Eyes Can Deceive You: The main reason why Meiko struggles with her arm wrestling match with Andre is because she can't stop staring at his long lone nipple hair. She then realize it's not a distraction if she can't see it, closes her eyes and quickly wins.

USC's Imprisonment story arc

• Above the Influence: As much of a Covert Pervert as he is, Kiyoshi refuses to take advantage of Chiyo's feelings of insecurity and jealousy towards her sister.
• Acrofatic: Andre, despite his egg-shaped body, engages in some impressive acrobatics during his masochist withdraw induced madness.
• Always Someone Better: For a while it seemed like Meiko and Hana were the two strongest fighters in the school. Then Risa is introduced, outfights Meiko, and even manages to block simultaneous kicks from both of them.
• Bad Date
  • Shingo's ended with his date beating him up and running away from him. (See The Blind Leading the Blind.)
• Batman Gambit:
  • Kate has proven herself to be a very skilled manipulator. All of the characters she's targeting know she's up to no good but still fall for her traps, most of which require minimal effort from her part.
    • She takes advantage of Meiko's eagerness to please Mari to further damage the USC's already-bad reputation. She has Risa take Meiko to the backyard to brush up fallen branches and leaves, then offer her sweet potatoes to roast once she's done. As it turns out, Kate had fuel poured over the the area beforehand so the bonfire Meiko made grew uncontrollable, and by the time Kiyoshi, Chiyo and Mari came to her aid the fire apparently already killed the chicks. The students who came to the scene assumed that Meiko killed the chicks for food, and the news quickly spread through a circular Kate wrote and printed out in advance. With Meiko unable to explain the incident, she blames herself and regresses to her old, submissive personality, and the USC gets a one-week extension because Mari went away from her work zone, which was counted as a breakout. As if all that wasn't bad enough, Kate uses the aftermath to announce her proposal to disband the USC. Considering the damage to the USC's reputation after their fall from grace, it certainly seems like a tempting proposition.
    • She also orchestrates one against Chiyo. When some of Kate's lackeys threaten to beat up Mayumi unless she strips for blackmail pictures, she surprises them with her sumo skills. Unfortunately Kate anticipated it, and even brought the Chairman to the scene from too far a distance to be able to hear the context, forcing him to have her serve time with her sister.
  • Mari on Kate. Mari manages to break out by smuggling in a pair of handcuffs under the assumption that a paranoid Kate would bind the two girls together to make sure Mari couldn't escape from her sight, then making it look like Kate's room had been broken into, thus forcing Kate to take Mari with her when she went to investigate. Had Kate not cuffed Mari to herself the plan would have failed, but Mari correctly guessed that Kate wouldn't pass up the opportunity to be chained to her hatecrush, something proven true when the latter fell for her Honey Trap and has sex with her on camera, using the footage as leverage to Kate's pictures of her and Kiyoshi also apparently having sex.
• Be a Whore to Get Your Man: Chiyo attempts to tart herself up when she misinterprets her sister as having stolen Kiyoshi's affections from her. Kiyoshi and Mari reassure her otherwise and she subverts this trope later.
• Be Careful What You Wish For: After Kiyoshi supposedly saves Mari by sucking snake venom from her thighs, Mari mentions that she hates being indebted to others. No sooner has she said this than Kiyoshi gets bitten in the ass by a snake and immediately wants to cash in his favor.
• Blackmail:
  • Hana does it to Kiyoshi with a picture of their makeout session. Her objective at that time? To get better-looking photos for future blackmail...
  • Kate blackmails Mari and Kiyoshi with suggestive footage of them taken during a Suck Out the Poison situation that she engineered for that very purpose, which is eventually countered by Mari blackmailing her right back again into a stalemate.
• The Blind Leading the Blind: Neither Kiyoshi nor Shingo have much experience with romance, but Kiyoshi did kiss Hana (under unusual circumstances). After some begging from Shingo, he tells the latter the events that led up to the kiss. Shingo tries to replicate the situation in his karaoke date with Anzu. He cuts off the top portion of a water bottle, takes off his pants, puts the bottle over his penis and walks towards Anzu. All of this causes a very startled Anzu to give Shingo a severe beating, which Kiyoshi told Shingo would happen since Hana beat him up as well. Unlike Hana though, who kissed Kiyoshi afterward (as part of her revenge), Anzu simply smashes a TV over his head and runs away.
• Break the Haughty: Back in grade school Kate and her posse constantly bullied Meiko for her unusually large breasts. That stopped shortly after Mari transferred and became friends with Meiko. When Kate tried to make fun of Meiko for her sarashi tearing apart, Mari embarrassed her in front of the class by calling her a "base woman". Then her attempt for revenge backfired when she, her posse and some boys tried to force Mari to beg for forgiveness. It almost worked but, at the sorry sight, the otherwise meek Meiko snapped, beat up the boys, scared off Kate's posse and would have beat up Kate too had Mari not taken the punch.
• Breakup Bonfire: After being tricked and taken advantage of by Mari, Kate sets fire to her collection of hatecrush paraphernalia.
• Bullying a Dragon: Andre as a prison guard is uncharacteristically sadistic towards Meiko, who is one of the strongest students in school and there isn't much stopping her from putting him in a lot of pain when she gets out. Which is exactly want a masochist like Andre wants. He's hoping that the crueler he is towards her the more vicious her revenge will be when she gets out.
• Chained Heat: Kate handcuffs herself to Mari to make sure the latter can't fulfill her promise to escape on the day of the sports festival. It ends up backfiring, however, because Mari tricked her into doing so, forcing Kate to take Mari with her when she received news that her room had been broken into, using Kate's hatecrush on her to trick her into having sex with her on camera.
• Destroy the Evidence:
  • Some clues help Chiyo deduce that the apparent death of the crow chicks wasn't an accident, one of which is that only part of the tree they were in was burnt and in such a way that lead directly to the nest. Unfortunately, the Kate, in covering her tracks, cut down and disposed of the tree before Chiyo could show Kiyoshi.
• Dope Slap: During the second half of the story where Mari gets locked up in prison with Kiyoshi, she resorts to hitting him whenever Kiyoshi does something perverted or stupid.
• Faking the Dead: Risa reveals to Kiyoshi that the fire that burned the tree with the crows nest didn't kill the baby crows because the Aboveground Student Council took them out and into a cage before the fire happened.
• Finger Muzzle: Andre quiets Risa, who's at a loss of how to be a good dom for him, by putting his finger on her lips and reminding her that she as a dom she should not ask questions or seek answers, she should just order.
• Fire-Forged Friends:
  • While working with Kiyoshi to take down Kate, Mari, who initially hated the boys, started warming up to him, to the point where Chiyo mistakenly assumes the two are together.
• Forced to Watch: Gakuto is tasked with watching Mari and Hana as they work but when Mari's pants tear, exposing her panties, Gakuto tries look away. Risa, however, uses her kendo stick to force him to keep his eyes on them no matter what because she wants to condition him not to have any respect for the female prisoners.
• Freak Out: The fire that apparently killed the three baby crows severely traumatizes Meiko because she, and the rest of the school, is tricked into believing that it was her fault. As a result of the trauma, her personality regresses back to the submissive personality she had in elementary school. This also causes Andre to lose his sanity due to his dependency on her abuse. He can't deal with a submissive Meiko that refuses to hurt him. He spends most of the chapters after that being unresponsive, neglecting his hygiene and muttering to himself.
• Freudian Slip: Mari is quick to reassure Chiyo that she hasn't let anyone put so much as a finger in her. On her!
• Gaslighting: Kiyoshi decides that the best way to get Risa's guard to slip is to simply mess with her repeatedly with various perverted acts until she starts to lose it.
• A Glass in the Hand: A variant, Hana pops a water bottle after finding out that after all the horrors she endured failing to force Kiyoshi to pee in front of her as revenge, he then went and did so completely casually in front of Risa.
• Green-Eyed Monster: Kate's actions towards Mari ultimately boils down to this.
• Hit Me, Dammit!:
  • Kiyoshi asked Hana to hit him so that he won't kiss her for real during Hana's "blackmail" attempt to get fake scandalous photos. While she didn't do as he requested, this was where the pair's Belligerent Sexual Tension hits its highest point.
• Holding Hands / Intertwined Fingers: Kiyoshi and Hana perform what is perhaps the most sexually charged handhold in manga history during one of their many awkward moments.
• Honey Trap: Mari sets one up on Kate to counter her blackmail pictures with some of her own.
• How the Mighty Have Fallen: The USC go from running the school prison to being inmates. Their guards are members of the real student council, who are just as abusive to them as they were to the boys. To add injury to insult, some of the boys have even been recruited to help out with their punishment.
• I Just Want to Be You: Kate really wants to be Mari, to the point of stealing her personal possessions, trying on her stolen underwear, and even has a wig that looks like Mari's hair.
• Interrupted Intimacy: Kiyoshi and Hana get interrupted right when they were about to give into their BST. Dammit Mitsuko!
• Ironic Echo: There's a lot emphasis on the panel where Kate calls Mari a "base woman" for her hypocrisy (see Moral Myopia). The irony of that insult is revealed in a later chapter that's a flashback. When the two were in elementary school Mari had used the very same insult on Kate in front of their entire class for making fun of Meiko in a childish manner.
• Laser-Guided Karma:
  • The USC's exposed misdeeds in the first story arc gave the ASC the opportunity to grab power by imprisoning the USC, taking over their duties and spread news to damage the USC's reputation. The ASC were just as abusive towards the imprisoned USC as the USC once were against the male students.
• Make It Look Like an Accident: The fire that supposedly killed Mari's baby crows was made to look like Meiko accidentally let it get out of control when it was really Kate who had fuel poured on the area and tree with the crow's nest.
• Marshmallow Hell: Occurs in a flashback chapter where Meiko puts one of her bullies in a choke hold from behind◊. Due to the height difference between them and Meiko's large breasts, the bully's head gets completely engulfed in her cleavage, causing him to get suffocated and faint◊.
• Meet the New Boss: The Aboveground Student Council. They were just as cruel and underhanded as the Underground Student Council once were, albeit for selfish reasons.
• Mistaken for Gay:
  • Mitsuko quite understandably mistakes Gakuto and Jo for a couple after seeing them role-play as such, ironically in an effort by Gakuto to become more comfortable with her interests.
• The Mole: Hana fakes defection to the Aboveground Student Council to spy for Mari.
• Moral Myopia: Mari knows Kate will try to provoke bad behavior from the USC in order to get their prison sentences extended, she even calls out Kate on it, telling her that she wouldn't put it past her to do something so low. Kate denies the accusation (even though it's exactly what she's doing) and also reminds Mari that what she's accusing her of and looking down on her for is the exact same thing she did to the boys. The look of stunned silence on Mari's face seems to indicate that she realizes Kate has a point.
• Mutually Assured Destruction: Mari is ultimately unable to get the photos of her and Kiyoshi back, so she instead forces Kate into a stalemate with blackmail pictures of her own.
• My God, What Have I Done?: Mitsuko gets a minor one of these when she realises that drawing boy's love manga about Gakuto and Jo without their permission was kind of a dick move.
• Ojou Ringlets: The Aboveground Student Council President Kate introduced in Volume 9. Even her eyelashes have curls!
• Panty Thief: What's this mysterious stolen possession of Mari's that Kate keeps in her treasure box? A set of Mari's underwear!
• Piggy Bank: Risa, of all people, has a piggy bank. She breaks it to get enough money to buy a domantrix outfit to wear for Andre. Fortunately, the shopkeeper at the store is moved by her passion to be a dom and gives her an old outfit for free.
• Refusal of the Call:
  • After Kiyoshi finds out that the apparent deaths of the three baby crows that Chiyo is devastated by was caused by the Aboveground Student Council, he immediately goes to recruit the rest of the boys in an attempt to find evidence against them. Considering how strong their friendship is it should have been easy to get them to join his cause. Unfortunately, none of them are even willing to listen to what he has to say.
    • Shingo is too angry to hear him out because his date with Anzu was ruined by Kiyoshi's advice.
    • Jo was already running away because he no longer wanted to help Gakuto understand yaoi since it involves homoerotic roleplaying. So when Kiyoshi tries to call for his help by begging him to go out with him, Jo runs away even faster.
    • He tries to appeal to Gakuto's love of the Romance of the Three Kingdoms by asking Gakuto to become his "Zhuge Liang". He means a strategist (Zhuge Liang was a formidable one) but to Gakuto, who has been researching yaoi involving Zhuge Liang, it comes across as Kiyoshi wanting to sleep with him. Gakuto runs away because because he doesn't feel worthy.
    • Andre can't listen to anyone since he's severely depressed over Meiko's personality change.
  • After Kiyoshi gets caught spying for the USC and sent to prison again, they find out about the conspiracy from Chiyo but they still refuse to help. Jo and Shingo refuse to take part in anything that would inadvertently help the USC, Gakuto doesn't want to go against the Aboveground Student Council since his love interest, Mistuko, is a member and Andre is still a mental wreck.
• Scary Flashlight Face: Kate when setting fire to her collection of Mari outfits after falling victim to her Honey Trap.
• Screw the Rules, I Have Connections!: After abusing their powers and almost getting five students expelled one would think the USC would get a harsher punishment than just house arrest. Kate confronts the chairman about it. When she accuses him of bending school policy for the USC because his daughter is a member he denies the accusation and agrees to her proposal to have the USC serve a prison sentence under the watch of the Aboveground Student Council.
• Sexy Discretion Shot: The manga shifts away from Mari and Kate getting intimate before we see too much, indicating what happened by cutting to an image of a double ouroboros instead.
• Shameful Strip:
  • The ASC made the newly imprisoned USC change to their prisoner's uniforms right in front of them.
  • Three of Kate's lackeys try to force Chiyo to strip as they record her.
• Slasher Smile: Kate sports a particularly crazy, veiny-eyed grin while swearing revenge against Mari for tricking her into sex on camera.
• Smells Sexy: Unsurprisingly, a small and dirty prison with just five guys smells pretty bad. Later on though, Kiyoshi gets sent to prison again, but this time he's locked in with Mari and Meiko. He notes that the prison is now "A lockup filled with the pleasant scent of women".
• Stanford Prison Experiment: Kate references the actual Stanford prison experiment as her reason for recruiting Andre and Gakuto as prison guards to watch over the USC. At first the two, especially Gakuto, were uncomfortable bossing around the USC but by the second day, with a little prodding by Kate who gives the two prison guard uniforms, they're just as cruel as the USC were to them.
• Suck Out the Poison: Kiyoshi and Mari are both forced to do this for each other in some very awkward places when locked in a bathroom with a bunch of snakes. The worst part is that they weren't even venomous. The Aboveground Student Council had put them there to film this very action for blackmail purposes.
• Surprise Party: A relieved Chiyo thankfully stops mistaking her sister's strange behaviour while planning a breakout as Mari having become a slut... because she starts mistaking it as Mari planning a surprise party for her birthday instead.
• Sweetheart Sipping: Hana forces Kiyoshi to share a soda with her when her first order of blackmail is to take some new blackmail pictures that aren't quite so unflattering.
• A Taste of Their Own Medicine: After their plot to expel the boys is revealed, the Aboveground Student Council usurps the Underground Student Council's authority and subjects the USC to the same treatment they gave the boys. It doesn't help that Kate, the Aboveground Student Council's president, hates Mari and Meiko, and is even more of a manipulative bitch than Mari was. It gets to the point where Kiyoshi gets thrown back in prison trying to help them out.
• Third Wheel: Hana admits that she's somewhat resentful of the fact that Mari and Meiko have known each other for much longer and seem to have a closer friendship to each other than they do her. Along with a some blackmail, Kate takes advantage of these feelings to get her to split from the USC and join the regular student council. Or at least so it initially seems.
• Victoria's Secret Compartment: Mari uses her bra to carry a phone she smuggled into the prison.
• We Need a Distraction:
  • During his second prison term, Kiyoshi uses an erection to distract Risa from the true location of the phone she was frisking him for!
• What the Hell, Hero?:
  • Kiyoshi is initially very angry when he finds out that Andre and Gakuto have become prison guards as he feels that even if they're still angry at the USC, becoming guards to bully them is taking things way too far. The two calm him down by assuring him that they're only doing it to help the Aboveground Student Council and have no intention of abusing their powers, though that ends up being the case anyway (see Stanford Prison Experiment).
• Yaoi Fangirl: During this story arc it is revealed that Mitsuko likes to read boy's love manga and even draws her own.
• You Can't Go Home Again: Jo ends up having enormous difficulty readjusting to life on the outside again. He almost deliberately gets himself thrown back in prison, were it not for the unexpected kindness of the passing girl Satou (and some cake).

Sports Festival story arc

• Accidental Hero:
  • Gakuto tries to retrieve the Plastic Bottle Rocket idol, which inadvertently contributed to diverting the helicopter's direction that was about to collide with the school.
• A Day in the Limelight: Mayumi and Satou each get their own chapter dedicated to them.
• Character Focus: During the Cavalry competition, Mari and Meiko eventually took over as co-protagonists while Kiyoshi was reduced to a supporting role along with the rest of the boys and girls in the USC teams.
• Cool Car: The Chairman has quite the sports car until it crashes off a cliff.
• Easy Amnesia:
  • The Chairman loses his memory after his encounter with a waterfall. He does avert Identity Amnesia however, as apparently nothing in existence can make him forget his love of asses.
• Inevitable Waterfall: The Chairman suffers one after braving a river to save a puppy.
• Kindhearted Cat Lover: Despite her brutish nature it's revealed Risa once had a cat called Antoinette that she loved very much and still considers to be a closer friend than any human.
• Mutually Assured Destruction: A non-fatal variant. After Kate's team was rendered immobile, her last resort was to activate Mitsuko's clumsiness, of which it triggered a chain of events that resulted in the prison's destruction. This shocking event halted the Sports Festival and prevented determination of the victor, but the prison's destruction also rendered both student councils powerless.
• Naked People Trapped Outside: Kiyoshi and Hana manage to pull a varient of Naked People Trapped Inside where they're trapped hiding under a bunch of futons when Chiyo interrupts yet another of Hana's attempts to pee on Kiyoshi for revenge.
• Nothing Is the Same Anymore: The final outcome of the Sports Festival.
  • The competition resulted in the destruction of the prison, which was the basis and setting for all the conflict in this series. Both student councils were strongly implied to be rendered powerless from this development, and Mari decided to go on an exchange program which means the USC is effectively disbanded.
• Out Of Body Experience: When Kiyoshi gets a boner while wearing panties in the Cavalry match in front of the entire student body, he pretty much felt his soul leave from his body there. He could do nothing but watch helplessly as his body became the walking dead and earned the scorn of every girl in Hachimitsu. He comes back, though.
  • Meiko goes through the same thing, but came back from it more determined than ever.
• Out of Focus: The Cavalry competition reduced Kiyoshi into a supporting role. By the end of the competition he and Hana were further reduced to non-speaking extras in which their sole purpose were merely to physically prop-up Mari and Meiko in their last stand against Kate's team.
• Pyrrhic Victory: The outcome of the Sports Festival for both Student Councils. Both Student Councils were successful in preventing their own disbandment, but..
  • The ASC had to move back to their less prestigious office, which strongly implies that they lost most of the power and influence they gained when the USC were imprisoned. This probably made them no more powerful than a real-life school's student council.
  • The USC was left powerless as well after the destruction of the prison (They can no longer enforce discipline by threatening imprisonment), and the ASC's smear campaign was successful such that the entire student body lost their former respect for the USC. Knowing she had ultimately lost every fight, Mari decided to go on a student exchange, which meant the USC is effectively disbanded.
• Refuge in Audacity: In-Universe. When close to being caught naked with Kiyoshi, Hana briefly contemplates claiming they were having sex or even just admitting the truth (her desire to pee on him for revenge) and trying to play it off like it was nothing, but she quickly realized this wouldn't really work.
• Rescue Romance: In chapter 197 it's implied that Anzu agreed to let Shingo feel her up (if they win the cavalry contest) because he saved her from a runaway pole.
• She's Back: In Chapter 228, Meiko finally snaps out of her submissive persona.
• Taking You with Me: After Chiyo's team was repeatedly demoralized with Kate's remarks, they rushed ahead with their remaining effort in a suicidal offense but Andre casually shakes off their attack and eliminated their team from the game.
• Wham Episode: When the smoke clears from the chicken fight, Mari's headband has been taken by Kate. The game ends in a tie, but the series' later ending implied that the ASC won overall. And due to the helicopter malfunctioning, it goes right into the prison and explodes. Nothing Is the Same Anymore, indeed.

Love Confession story arc

• All for Nothing: It is implied that Mari had made plans to leave school during her imprisonment, which means that all her subsequent efforts to preserve the USC are for nothing, because without her the USC would be as good as disbanded. This was subverted in the ending of the final chapter, showing that Chiyo will be running the USC in her place, ensuring that it'll keep going for a while.
• The Atoner: Mari acknowledged that she was the root cause of all the mess that happened in the school so far, skipping the BBQ celebration, gave up her Underground Student Council position, and going on a student exchange without notice.
• The Bad Guy Wins: While far from being a genuinely malicious character, Hana was clearly written as an antagonist in this story arc, and the ending of the final chapter strongly implied that she succeeded turning Chiyo away from Kiyoshi at the very last moment of the confession scene.
• Compensated Dating: A variant occurs where Hana pays Kiyoshi to do chores for her, namely carrying her shopping bags. Kiyoshi was completely clueless that this was a paid date in all but name.
• Cruel Twist Ending: Hana, enraged and jealous that Chiyo accepted Kiyoshi's feelings, forces him to strip to reveal that he's still wearing Hana's panties. Chiyo becomes so distraught that he lied that she becomes a second Mari, and sometime later becomes the new President of the Underground Student Council. End series.
• Deus Angst Machina: A big one relative to a comedy series. For the past few days before the BBQ, Chiyo continued with her naive optimism that people are planning a surprise birthday party for her. Not only did that not happen, Hana meets her only to give her a disparaging account of Kiyoshi, whom she had a crush on. Kiyoshi arrives, and not only did he not know it's her birthday, he gave his love confession while at the same time admitting to all the crazy things he did with Hana. Chiyo, ever the understanding girl, still chose to accept both the good and bad side of him. Seeing this causes Hana give up trying to prevent the two from dating and give them her blessing on their relationship... Well, she tries to do that but instead has a change of heart and decide she simply can not allow Kiyoshi to date Chiyo. So she reveals to Chiyo one last lie that Kiyoshi told her - He did not leave Hana's panties in his drawer. He's actually been wearing them to make a love confession to Chiyo, and in the shock of that revelation completely shatters Chiyo's trust in Kiyoshi and men in general.
• Didn't Think This Through: Meiko and Kate rush to the airport to catch up to Mari before her flight leaves. Unfortunately, they were in such a hurry they didn't think to find out which airport Mari is flying from and by the time they realize their mistake it's too late.
• Earn Your Happy Ending: After the many mishaps, misunderstandings, and perversions happening around all the characters, the only official couple came from the romance side-plot involving Andre and Risa.
• First Girl Wins: Not a single instance was this trope played straight in the final story arc.
  • Subverted: Kiyoshi's love confession to Chiyo was initially reciprocated... until the very final chapter when Kiyoshi's final lie was exposed, and Chiyo's ending strongly implied that the confession was ultimately not successful.
  • Averted:
    • Andre's love confession was to Risa, not Meiko.
    • Gakuto ended up with no one when he hesitates choosing between Mitsuko and Bitch.
  • Unresolved: Both Meiko and Kate failed to reach Mari before her plane departure.
• Flowers of Romance: Kiyoshi attempted to buy "confession flowers" on his way so as to be able to do a proper love confession to Chiyo.
• Forgotten Birthday: Chiyo's, actually, which makes the situation worse for her since her dad's in jail and her sister's left without any warning. Kiyoshi is the only one that actually bothers to go, but even then it wasn't because he remembers her birthday— it's because he thought it was a tanabata party and he wanted to confess to her then.
• Freak Out: Chiyo's ending, see Deus Angst Machina example above.
• If I Can't Have You…: Hana decided to ruin Kiyoshi's Love Confession to Chiyo. It was clearly done out of jealousy but Hana continued to delude herself saying that it was for Chiyo's sake. At the very end, Kiyoshi finally figured out that Hana had a crush on him and accused her of being so childish with this trope.
• Jerkass Has a Point: Hana's decision to try and dissuade Chiyo from accepting Kiyoshi's love confession is one made purely out of spite and jealousy, but it doesn't change the fact that everything she accuses Kiyoshi of is true: He is a manipulative liar; he is a closet pervert; and he has participated in several perverted and degrading acts with Hana behind Chiyo's back. Kiyoshi is only willing to admit to all of this after Hana forces him to, and is caught out on a brand new lie even after Chiyo showed she was willing to accept him even after all the other revelations. The last point is finally enough to convince Chiyo to reject Kiyoshi completely.
• Love Confession:
  • Hana tried to make a love confession to Kiyoshi at the end of their paid date, but her pride held her back from making it clearer to a still-oblivious Kiyoshi.
  • And of course, Kiyoshi himself finally, finally gives his to Chiyo in the last arc. He also ends up telling her about every lewd and deplorable thing he did while in Hachimitsu, leading her (initially) to accept his feelings and his negative side because she likes him too.
• Love Triangle: While present in other story arcs, this trope had the strongest and most prominent play here.
  • Gakuto, Mitsuko, with Bitch-senpai as a late Third Wheel.
  • Andre, Risa, and Meiko
  • Mari, Kate, and Meiko
  • Last but not least: Kiyoshi, Chiyo and Hana. The ending implied that nobody won.
• Relationship Sabotage: That was more or less Hana's actions throughout the final story arc, being unable to make a love confession to Kiyoshi, she did everything she could to keep Chiyo and Kiyoshi apart.
  • Even before the start of the final story arc, she intentionally ruined Kiyoshi's reputation, claiming to do it for the survival of the Underground Student Council in the contest.
  • She asked Chiyo to stay away from Kiyoshi, using the excuse that Chiyo's own reputation was at stake from looking up a recently disgraced Kiyoshi.
  • When Chiyo asks Hana to pass a note to Kiyoshi on her behalf, Hana ripped it up and shoved it into Kiyoshi's face. When Kiyoshi re-assembled the note he misinterpreted it as a declaration of hate, when it was really just Chiyo expressing her concern.
  • In a private conversation with Chiyo, she deliberately attacked Kiyoshi's character to test the Chiyo's reaction, and was upset when she learnt that Chiyo herself had a crush on Kiyoshi too.
  • Subverted: There was just one instance she showed kindness to Kiyoshi, and that was when she helped Kiyoshi plan his love confession and also paid him to do chores for her - In practice it was a paid date in all but name. She apparently wanted to make her love confession before Kiyoshi make his to Chiyo but her pride held her back at the last moment.
  • After her own love confession to Kiyoshi failed and learning that Kiyoshi and Chiyo had a mutual crush on each other, Hana knew she was running out of options. Hence she intervened during the Love Confession event itself and shamelessly gave Chiyo a disparaging account of Kiyoshi in the hopes that Chiyo will reject him. She succeeds.
• "Shaggy Dog" Story:
  • Meiko and Kate spend most of the arc desperately trying to get to the airport and stop Mari from leaving the country. They eventually make it to the airport but unfortunately that airport wasn't the airport Mari was leaving from and by the time the two realize their mistake Mari's flight is just about to depart.
  • Kiyoshi's goal from the very beginning of the series has been to get into a relationship with Chiyo. By the end the chances of that ever happen get obliterated by Hana revealing to Chiyo that Kiyoshi lied about not wearing Hana's panties breaking her trust in him. However, this causes Kiyoshi to come to the realization that he actually never had a chance of getting with Chiyo since their entire relationship so far has been built on lies.
• Stereotype Flip: As the Chairman talks to himself about his regrets and his children, he reveals to the audience that he saw Mari as the selfish, spoiled and naive daughter rather than innocent, sweet Chiyo, who he considers the stronger of the two.
• Sudden Downer Ending: Not only do Kiyoshi and Chiyo not become a couple, but both are seemingly left completely broken and embittered, with Kiyoshi admitting to himself that he hadn't grown as a person at all and Chiyo becoming a cold and detached man-hater in the same vein as her older sister.
• They Wasted a Perfectly Good Sandwich: Pretty egregious example of this trope.
  • The only ones to attend the BBQ party were Kiyoshi, Hana, and Chiyo, and the only BBQ-related action they were seen doing was heating up the coals before the grand finale and twist was played out.
  • Gakuto, Shingo, Joe, Mayumi, Anzu, and Satou seemed to have completely forgotten they are supposed to attend a BBQ, and were elsewhere playing in the water instead.
  • Meiko skipped the BBQ to look for Mari at the airport, who was supposed to attend as well.
  • Andre skipped the BBQ to make a love confession to Risa.
• Took a Level in Jerkass: As the series progressed to the final arc, it becomes apparent that Hana had grown into a rather unsympathetic character through her actions to keep Kiyoshi for herself.