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From left to right: Karane Inda, Rentarou Aijou, and Hakari Hanazono. Not pictured: Rentarou’s 98 other girlfriends.
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Yes, you just read the title correctly.

The 100 Girlfriends Who Really, Really, Really, Really, Really Love You (original Japanese title: 君のことが大大大大大好きな100人の彼女 Kimi no Koto ga Dai Dai Dai Dai Daisuki na Hyakunin no Kanojo) is a serialized manga written by Nakamura Rikito and illustrated by Nozawa Yukiko in Weekly Young Jump. The first chapter debuted on January 5th, 2020.

Rentarou Aijou has experienced 100 heartbreaks in his short life. While praying in a shrine, the God of Love appears, saying that due to a clerical error Rentarou will meet 100 soul mates in high school. However, anyone who fails to fall in love with their soulmate will lose all luck and die a tragic death. Now it's a matter of love or death, and it's up to Rentarou to decide.

Seven Seas Entertainment licensed the series for English release starting February 2022.

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Has a character page here and a recap page here.


Trope sub-pages:

So, these are the tropes of a wealthy family...

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    A-C 
  • Absurdly Youthful Mother:
    • Hakari's mother, Hahari, had her when she was 13 (via artificial insemination). Granted, that raises further questions...
    • Zigzagged with Kusuri’s mother. She’s 55 years old,note  but she also took the failed immortality drug that made Kusuri look like an 8-year-old, giving her a similarly aged appearance.
    • Old Lady Yakusen is 89 years old, but she also took an improved immortality drug, meaning she too has the body of an 8-year-old.
  • Abusive Parents:
    • Though it's never straight-up said that the woman yelling at a younger Shizuka and calling her a freak was her mother, it's pretty clear that’s the case, since she blamed Shizuka for being “creepy” and Shizuka cowered before her on the verge of tears. She is by far the most hated character despite appearing in only two panels.
    • Hahari becomes this when she finds out her daughter is in a relationship, forbidding her to ever leave the house and threatening to have her boyfriend killed. However, she quickly does a Heel–Face Turn when she becomes one of Rentarou’s soulmates.
    • Mei's parents abandoned her after destroying her self esteem to the point where she no longer felt her life was worth anything.
    • Naddy's parents would lock her in the storehouse for making mistakes, and when she adopted a more American-style look, with dyed blonde hair and an "I Love America" T-shirt, they kicked her out of the house and forbade her from ever returning.
  • The Ace: Rentarou sought to better himself to avoid his frequent romantic rejections. By the time he enters high school he has excellent grades, communication skills, style, kindness, and athleticism.
  • A-Cup Angst: Karane will often lament about her small bust, especially compared to Hakari.
  • Addiction Displacement: In Chapter 107, Rentarou breaks the girls’ newfound cabbage addiction by invoking Spaghetti Kiss with the meat, since the girls are addicted to kissing him.
  • Adults Dressed as Children: Hahari's idea of a "freedom outfit" is to dress as a high schooler.
  • Affectionate Parody: Of typical harem manga. It has all the typical tropes for the harem members while cranking up the number to exaggerated levels, and making the main character be forced to gather a harem.
  • Alcohol Hic: Invoked in Chapter 109. Rentarou serves the girls cold drinks in hot rooms (or vice versa) to give the girls hiccups as part of his plan to simulate drunkenness.
  • All Just a Dream: The Volume 3 bonus chapter has Hahari pampering Rentarou in her office before seducing him into fondling her breasts. At least, that's what Hahari dreams about after falling asleep while playing House with Kusuri.
  • All Women Are Lustful:
    • In Chapter 21, the girls are trying to peep on Rentarou bathing, with the exception of Shizuka who tries to block their way. The others tie her up in a blanket, and somehow she makes her way to the bathroom where she sees Rentarou naked and passes out from Nosebleed.
    • In Chapter 54, Chiyo forbids the girls from kissing Rentarou at school. All of them can barely handle it and eventually stage a protest.
  • Ambiguously Bi: A lot of the girls have shown attraction to at least one of the other girls at one point or another. For some it's just a basic acknowledgement of the beauty and cuteness of the others, but others have also shown very explicit Homoerotic Subtext.
  • Ambulance Cut: In Chapter 27, the Gorira Alliance attempt to finish a ramen-Eating Contest after already having had gorged on a ton of food from earlier in the competition. The next panel shows them being taken away by ambulances.
  • And I Must Scream: Chapter 11 involves all the at the time current girlfriends (except Kusuri) becoming "zombies" who only care about kissing Rentarou to the exclusion of everything else, even rational thought.
  • Anger Born of Worry:
    • In Chapter 19, Karane slaps Hakari and calls her an idiot after what the latter put them through with Hahari pre-Heel–Face Turn. Considering both of them began sobbing in Rentarou's arms right after, she was more upset she could have lost her friend.
    • Played for Laughs in Chapter 104. After being helped back home by the girls through an arduous journey, the rabbit’s mother smacks his face before escorting the girls to a flower meadow.
  • Animal Motifs: Mei is repeatedly compared to a dog, with how eagerly and excitedly she obeys her master's commands.
  • Anti-Climax: After Rentarou and Mei lock eyes, Mei says that she cannot fall in love with him as it would be improper for a maid to fall in love with her master's boyfriend, complete with fake ending credits. The very next page, Hahari orders her to be Rentarou's girlfriend and she accepts.
  • Arc Words: "...really, really, really, really, really..."
  • Armor-Piercing Slap:
    • Karane gives Hakari one after the latter's suicide attempt.
    • Quali Tina, the girls' idol coach, gives one to Hahari in Chapter 62. Mei gives her one right back.
  • Art Shift: At the end of Chapter 41 the girlfriends' beautification efforts have turned them all into '70s shoujo characters.
  • Baby Morph Episode:
    • Chapter 28 features the girls (except Hakari) turned into babies thanks to one of Kusuri's drugs (again).
    • Chapter 84 repeats the above with all the girls who weren’t baby morphed before.
  • Bad Liar:
  • Bait-and-Switch: In Chapter 74, Rentarou is invited to Kusuri’s home. Remembering how he got Zing’d with Hahari and Chiyo, Rentarou braces himself for a Zing from Kusuri’s mother… and nothing happens. But then Kusuri’s grandmother comes home and—ZING!!
  • Balanced Harem: Rentarou does everything in his power to invoke this trope, no matter how many girlfriends he collects. The series' Tagline is "the romcom with zero losing heroines", after all.
  • Baseball Episode: Rentarou's family joins Iku's baseball club to prevent it from being shut down after all the other members went to America for training. If they can win the next practice game against Jurassic High, the club is saved.
  • Batman Gambit:
    • Rentarou pulls one off in Chapter 25. In an Eating Contest in which the preliminary round has the contestants eat rice and various side dishes, but only the eaten rice counts towards one’s team’s score, he deliberately taunts Kurumi with a beef bowl, knowing that she won’t be able to resist it. Her reaction is so over-the-top, of course, that the other contestants are all tempted to go for the side dishes instead of the blander rice, allowing Rentarou and Kurumi to make it to the next round by eating nothing but that. Of course, had the other teams ignored them, he’d have put his team at a disadvantage.
    • Rentarou uses a variety of these in the sumo wrestling tournament at the end of Volume 8, exploiting certain personality quirks of the girls to gain an advantage over them.
    • Mimimi's opponent in the track and field round in chapter 97 makes fun of Mimimi's face, knowing that her instinct to stop distorting her face while running would slow her down. She tries it again in chapter 99, but this time, Mimimi doesn't fall for it.
  • Beach Episode: Or rather, Pool Episode. Chapters 8 and 9 has Rentarou and his then current girlfriends head for an indoor pool.
  • Be Careful What You Wish For: Rentarou wishes for a girlfriend; he gets one hundred of them.
  • Berserk Button:
    • If anyone says anything remotely negative about one of his girlfriends, Rentarou flies into a rage and has to be restrained.
    • Picking on Shizuka is this for the whole harem. Someone doing so in chapter 35 causes all of them to become blonde and get a massive power up.
  • Bespectacled Cutie:
    • Chiyo's signature look includes her glasses, and she'll cry if she loses them.
    • Chapter 93 is devoted to showcasing the whole family as these, in ways that fit their archetypes.
  • Big Damn Kiss: These happen a lot over the course of the manga between Rentarou and his many girlfriends. They're always presented as epic moments, too, despite their frequency.
  • Big Fancy House: Hakari lives in one, much to Rentarou's surprise when she is placed under house arrest by her mother.
  • Big Ol' Eyebrows: Rentarou has thick black eyebrows.
  • Blackmail: Toruru Kijineta uses photos of Hahari's amorous interactions to blackmail Hahari into letting her continue harassing Meme for photos of her.
  • Bland-Name Product: Bocky sticks, and a 6-11 shows up in Chapter 24.
    • Chapter 27 mentions D*sons.
    • In Chapter 60, Iku mentions that she is going to see Pa-On: The Bludge.
  • Blatant Lies: Chapter 42 is called "Just a Totally Normal and Average Hair Styling Chapter".
  • Blind Without 'Em: Chiyo can't see well without her glasses, and the stress of it is enough to make her bawl her eyes out.
  • Blood from the Mouth: Played for Laughs in a non-lethal manner:
    • Rentarou coughs up blood in Chapter 18 when the Lie Detector registers Karane’s initial answer about her feelings for him as false, and keeps coughing up blood until she answers with a Title Drop and the machine registers the answer as true.
    • He also vomits blood in Chapter 33 after pretending to reject Iku’s confession.
    • Mei starts vomiting blood in Chapter 47 as she’s about to kiss Hahari.
  • Breast Expansion: In Chapter 77, both Hakari and Karane get into a bath that enhances their chest size. Karane refuses to leave it, knowing that her chest size will return to normal once she does, but Hakari manages to talk her into doing so.
  • Brick Joke:
    • The start of Chapter 29 shows the Vice Principal chasing after an ostrich that escaped from the zoo; the very end of the chapter reveals that she had been kicked in the head unconscious by said ostrich.
    • One of the first drugs Kusuri uses on Rentarou is the blood magnetization drug, which Kusuri mentions would cause two people to attach upside down from one another if they each drink the same polarity dose. In Chapter 61, Kusuri splashes two men harassing her, Shizuka, and Chiyo with said drug, with both men drinking enough of the drug that they get stuck together in the aforementioned upside down position.
    • At the start of Chapter 89, the monk in charge of the Serious Overnight Ascetic Training states that the training is so hellish that only one person has ever made it to the end. The very last panel reveals that that person was none other than Rentarou.
  • Bridal Carry:
    • Rentarou carries Nano like this in Chapter 26, while helping her off of the platform she has gotten stuck on.
    • Iku carries Rentarou like this in Chapter 60, when he is too exhausted to walk home.
    • In Chapter 73, Hahari remembers that Rentarou once carried her like this during a date when she suffered a Broken Heel.
    • In Chapter 80, Rentarou carries Hahari, Mei and Mimimi like this - at the same time.
  • Briefcase Full of Money: Hahari apparently keeps these on hand at all times. She gives one to Kusuri when playing pretend, much to the envy/astonishment of the other girls (the cash blows away in the wind).
  • Broken Pedestal: Downplayed - while the girls are a bit disappointed that Kishika isn't as cool as they first thought, they're happy enough to accept her.
  • Burger Fool: The splash panel for Chapter 71 depicts the girls as roller skate-wearing fast food workers at a burger diner.
  • Buxom Is Better:
    • Hakari often brags about her G-cup chest to get on Karane's nerves. She becomes deeply frustrated when Meme is revealed to have an even bigger chest.
    • Her mother Hahari has even bigger I-cup breasts, and is quite willing to use them to seduce Rentarou.
  • Call-Back:
    • Ahko recognizes Rentarou and the girls from when they created their own idol group.
    • In Chapter 91, the girls dive in for a kiss from Rentarou while chanting "Kiss!", with a side note explaining that they’re not drugged.
  • Cassandra Truth: When Rentarou mentions he has 21 Girlfriends when at a fantasy cosplay event, other guests assume he's just making up a cool backstory.
  • Cast Full of Crazy: The fact that this work has its own page for Dysfunction Junction should tell you just how insane the characters are.
  • Cast Herd: Averted. All the girlfriends are together on the roof whenever Rentarou goes up there, and there are no distinct separations of groups within the harem.
  • Catapult Nightmare: Played for Laughs in Chapter 56. Rentarou wakes himself up whenever his dreams has him getting intimate with any of his girlfriends.
  • Catch a Falling Star: A surprisingly recurring occurrence in the manga.
    • Shizuka gets caught by Rentarou after bouncing off the chests of the other haremettes in Chapter 14.
    • Baby!Karane and Baby!Kurumi get caught by Rentarou after being dropped by Hakari in Chapter 28.
    • Shrunken!Nano gets caught by Rentarou after getting blown out of his pocket in a windstorm in Chapter 72.
  • Cat Girl: Both Kusuri and Yaku dress like this in the splash page for Chapter 76.
  • Character Focus: Apart from their respective intro chapters, almost all of the girls have gotten additional focus chapters somewhere down the line. These generally come in three flavors: a "solo" date with Rentarou, a hang-out story with a fellow girlfriend, or a date with Rentarou and a fellow girlfriend.
    • In the first category:
      • Chapter 44 (Kurumi)
      • Chapter 47 (Mei)
      • Chapter 60 (Iku)
      • Chapter 72 (Nano)
      • Chapter 79 (Hahari)
      • Chapter 90 (Shizuka)
      • Chapter 103 (Hakari)
    • In the second category:
      • Chapter 55 (Meme and Mimimi)
      • Chapter 71 (Chiyo and Naddy)
      • Chapter 78 (Hakari and Yamame)
      • Chapter 89 (Iku and Mei)
      • Chapter 92 (Ahko and Karane)
    • In the third category:
      • Chapter 105 (Yaku and Kishika)
      • Chapter 111 (Ahko and Uto)
    • In addition, most of the bonus volume chapters are focus chapters, mainly flashbacks to the cast's pasts:
      • Volume 1 is baby Rentarou.
      • Volume 3 is Rentarou and Hahari.
      • Volume 4 is Mei and Hahari's first meeting.
      • Volume 5 is little Iku.
      • Volume 6 is baby Meme.
      • Volume 7 is pre-Naddy Nadeshiko.
      • Volume 8 is little Yamame.
      • Volume 9 is little Momiji, Hakari and Hahari (with Yaku's flashback getting censored).
      • Volume 10 is little Kishika.
      • Volume 11 is baby Ahko and Uto.
  • Cheaters Never Prosper:
    • Takeko Deluxe cheats an Eating Contest by dressing up a machine to store all of the food, letting her eat without end. In the last round, her machine gets full and she's forced to use her own stomach, but it isn't enough and she loses while barfing like crazy.
    • The mayor of Kiraisugi-chou attempts various cheats in the sports festival. At first, he hires professional athletes and uses (what's essentially) bribery to make the festival officials cheat for him, but once the girls find ways to exploit their own quirks, his plan falls apart. This comes to a head when he tries to have Sukisugi-chou conduct the relay race with an oiled baton; not only does the official accidentally oil everyone’s batons, but the girls manage to handle their baton better than the other teams.
  • Chekhov's Gun: In Chapter 11, Kusuri gives Shizuka a drug that causes Shizuka to grow rabbit ears. Shizuka uses the same drug in Chapter 42 to lure away the strands of Hahari's hair.
  • Chemistry Can Do Anything: Kusuri's various drugs, from reversing aging to body swapping to giving Prehensile Hair.
  • Chick Magnet: The very premise of this series is that Rentarou is an extreme example of this, having 100 soulmates.
  • Cliffhanger: Chapter 14, "The Holy War of Love and the Soul", ends with Hakari asking Rentarou to break up with her. We don’t learn till the next chapter that this is because her mother is prohibiting her from ever seeing her friends again.
  • Clothing Damage:
    • Kusuri's "become even sexier" drug causes Hakari's clothes to melt off of her body, leaving her naked.
    • The Tyranno Cannon Full Burst is such a powerful fastball pitch that not only do Iku's clothes blow off in the wind when she hits it, but Rentarou is left in his underwear just from catching it. Fortunately, undergarments are unaffected.
  • Cloudcuckoolander: Just to save a whole lot of time here, nearly everyone on practically every level.
  • Compressed Vice: Happens in many chapters as Rule of Funny demands, but most prominent in Chapter 52, where the entire harem (Rentarou included, arguably) gets hit with this so Chiyo can show off her Super OCD. The "vices" in question range from literally just-invented (Shizuka's permanently-unruly hair, Nano being a Flat-Earth Atheist) to preexisting-if-petty (Hakari, Karane, and Mimimi violating the school dress-code), to legitimately valid (Kusuri's obsession with drugs, Mei driving with Eyes Always Shut, Hahari's entire... existence).
  • Contrived Coincidence:
    • Subverted. Kusuri just happens to have a special drug that allows people to see infrared, which is just what the gang needs to get past the infrared alarms in Hakari's house and help her escape - but it turns out Kusuri had the drug on her because she was actually planning on mailing it to a company that specialises in making drugs, in the hopes of becoming employed by the company and going to America to make drugs there. The others are shocked that she's giving up this once-in-a-lifetime opportunity to help them rescue Hakari.
    • Played straight with regards to both Hahari, and, later, her maids Mei and Mai being among Rentarou's destined soulmates. In the former case, it saves their lives since it means she gives up trying to forcibly separate Rentarou and her daughter, but the latter two are present for quite some time before they finally lock eyes with him and fall in love.
    • Also played straight in Chapter 84, when the damage Kishika does to the test tube containing Kusuri's babyfier drug turns Kishika and everyone else who was standing nearby into babies - and it just so happens that Hakari and all the girlfriends from Mei onwards were standing near her.
  • Cool, but Inefficient: Nano and Kusuri almost mention this trope word for word in Chapter 34 when talking about the latter spinning her arm to throw a baseball.
  • Crash into Hello:
    • How Rentarou meets Hakari and Karane.
    • Hiro invokes this by rolling a marble unto Rentarou's foot.
  • Credits Gag:
    • A fake end-of-chapter caption is shown when Rentarou gets captured by zombie-Nano, declaring the end of the series... but the fake credits ask what's going to happen on the next page.
    • A similar cliffhanger happens with Mei declaring she cannot be Rentarou's girlfriend. The next and final page has Hahari order Mei to do it and the problem is suddenly gone.
    • When the world gets covered in Hahari's hair, the end-of-chapter caption declares it's the end of the series and invites readers to look forward to the creators' next projects. The credits, however, point out this is the first chapter of Volume 6.
    • When Rentarou confesses to Meme, she gets so embarrassed she disappears. The captions on the next page say "It was the last time that anyone would see her ever again. She was the one person he couldn't save..." and the end-of-chapter credits announce that the series will now be retitled "The 99 Girlfriends Who...". Rentarou, of course, is having none of this and rips the previous pages out.
    • After the girls put on an amateur idol show for a school festival, they get scouted by a producer and the credits announce that the "Idol Road Arc" is about to begin. Then the producer states that as idols, they will be forbidden from romance. The next page has them immediately walking out of the room, and the credits announce the end of the "Idol Road Arc".
  • Creepy Child: Shizuka’s mother apparently thinks she is one because she doesn’t speak aloud, calling her this trope by name to her face. Neither the other characters nor the readers agree.
  • Crippling Overspecialization: During the baseball arc, villainous pitcher Terano specializes in overwhelming fastballs, which have such force that any batter who tries to swing the bat at them will wind up badly injured. The Ohananomistu team realizes the ball travels the same path every time and they can easily bunt it, allowing even weak team members to score bases.
  • Cute Mute: Deconstructed with Shizuka, whose shyness causes her not to speak aloud but instead point out all her lines from a book, which caused people to shun her as a freak, which made her more shy, in a vicious cycle.
  • Cuteness Overload:
    • Happens frequently to Rentarou when his girlfriends get flirty.
    • Happens to the whole cast when they see Rentarou cross-dressing during the slumber party.
    • Hahari is especially prone to it whenever the shorter family members do something cute.
    • Exaggerated when the group goes to Karaoke. Kusuri doses everyone with a "super sensitive to cuteness" drug, at which point Shizuka singing is enough to affect them like hurricane-force winds.
    • This is a running gag, where the overloaded individual has their soul exit their body, requiring another person to grab it and put it back in.
  • Cute Witch: Chiyo dresses like this in the splash page for Chapter 76.

    D-G 
  • Dandere: Shizuka. Her voice is so quiet she decides to communicate by pointing to passages in her favorite book. Rentarou makes her a text-to-speech phone app so she can look people in the eye when speaking.
  • Dangerous Forbidden Technique: Terano of the Opposing Sports Team can only use her ultimate fastball, the Tyranno Cannon Full Burst, once per game, because any more and she'd dislocate her shoulder. She saves it for when it's the bottom of the ninth with two strikes and two outs, and it'll all be over no matter what after this pitch.
  • Deconstructive Parody: This manga thrives on Deconstructed Character Archetype, yet it is also a Gag Series at the same time.
  • Defrosting Ice Queen: Nano. Her meeting Rentarou taught her there was more to life than being perfectly efficient, and she is learning to care for others.
  • Denser and Wackier: This manga already starts out far crazier and sillier than typical harem series, then the craziness only intensifies as the manga goes on and adds more girlfriends.
  • Died in Your Arms Tonight: We see a flashback to what is very likely the exact moment Hakari’s father died, when he is consoling Hahari, asking her to not give up on love after he is gone, and she is holding his hand. Then he smiles as the sun sets behind him. No wonder Hahari is so messed up...
  • Distracted by the Sexy: Nano and Hakari have a hard time giving Rentarou CPR because they lose their concentration when doing mouth to mouth.
  • Don't Try This at Home:
    • When Nano shoves sushi down her throat without chewing it, there is a quick editor’s note saying, "Unless your throat is made of a special alloy, please do not imitate this."
    • Also, Chapter 39 opens with Hahari, Mei and Kusuri hanging out and drinking from wine glasses. Since the latter two are under Japan's drinking age, the caption at the bottom says that the manga does not condone underage drinking, but that Mei is drinking grape juice and Kusuri has a strong drug. So underage drinking is bad, but drug use is A-OK.
    • Chapter 58 warns people against placing themselves in People Jars.
    • In Chapter 61, Rentarou uses two shopping carts as makeshift weapons to frighten two guys who are threatening Shizuka, Kusuri and Chiyo. A caption at the bottom of the panel tells people not to try it at home, unless someone important to them is about to be killed.
  • Doomed New Clothes: Mimimi buys Rentarou a whole new white outfit upon meeting him for the first time. While taking a break after the excursion, Mimimi makes some comments about beauty that cause one of their fellow shoppers to become offended and throw bubble tea at her. Rentarou shields Mimimi, but his new outfit is stained with the drink.
  • Double Entendre: This exchange from Chapter 27:
    Announcer: It’s like they’re D*sons!
    Karane: What’re ya tryin’ to say? That they’re vacuums that don’t lose their suction?
  • Down to the Last Play: Done twice in one game! First, Rentarou's family are down by six, so the mercy rule will cause the game to end early and them to lose if, after the next inning, they give up any more runs. Shizuka makes an error that gives the other team three runs, which causes her to run to the dugout crying and her teammates to go Super Smitten. They are able to pull off a miracle rally entirely through bunting, and manage to lower the opponents' lead to three runs by the bottom of the ninth, with two outs. Then they manage to load the bases in time for Iku to hit a grand slam, winning the match.
  • Drill Sergeant Nasty: The monk in charge of the Serious Overnight Ascetic Training has this sort of personality, although he never once loses the smile on his face.
  • Drink-Based Characterization: Chapter 106 blazes through standard drink orders for the entire harem - much to Chiyo's horror, they're all different and she can't keep track. In general, the more ladylike girlfriends order various teas, while the youngest ones like Kusuri, Chiyo, and Kurumi order fruit juice and sodas. Nano, naturally, takes water, while Uto tries to look cool by ordering coffee.
  • Drugged Lipstick: In Chapter 41, the girls kiss Rentarou while wearing Kusuri’s "makes kisses feel extra amazing" lip balm.
  • Drunk on Milk: Invoked during the "Drinking Party" that Rentarou hosts. The only drink served is fresh squeezed fruit juice but Rentarou uses the power of suggestion and stagecraft to get everyone feeling drunk.
  • Dull Eyes of Unhappiness: Iku after non-tsundere!Karane paddles her with a baseball bat, making her the first girl to want Karane back to her old self.
  • Early-Bird Cameo:
    • Shizuka and Nano make brief appearances in the first chapter.
    • Mei and Mai both make several brief appearances before their full introductions.
  • Early-Installment Weirdness: For the bonus chapters in the volumes. Volume 1 is a flashback to Rentarou's past, but Volumes 2 and 3 are fanservice chapters, with 2 being a "guess that breast" game and 3 being about Hahari getting some alone time with Rentarou. Volume 4 does another flashback, this time for Mei and Hahari, and subsequent volumes continue doing stories from the characters' pasts.
  • Easily Forgiven: As soon as Hahari and Rentarou find out they’re soulmates, she lets them go and everyone forgets that she was keeping Hakari prisoner in her own home and tried to have Rentarou assassinated. Justified due to her backstory, in any case.
  • Eating Contest: Kurumi's introduction arc involves Rentarou and the girls participating in one to break in the new member.
  • Edible Theme Clothing: In Chapter 58, Kurumi's "freedom outfit" is a macaroon fairy outfit covered in edible macaroons.
  • Elimination Catchphrase: Inverted. "And so, due to how things panned out, would you guys mind accepting [new girl] as my newest girlfriend...?"
  • Elmuh Fudd Syndwome: The Teddy Babies talk this way. Justified, as they're supposed to be, well, teddy babies.
  • Ensemble Cast: The titular girlfriends. Different chapters give different amounts of attention to different girls, with all of them on equal footing no matter how long they've known Rentarou.
  • Entertainingly Wrong: In Chapter 73, a TV reporter decides to interview the girlfriends about their boyfriends, unaware they all have the same boyfriend, and the girlfriends don't bother correcting her.note  She's left thinking their boyfriends are monsters, when in truth Rentarou is just Like That. Then Rentarou himself pops up and she decides to interview him... and he describes the girlfriends as if they're one girlfriend.
  • Everyone Has Standards: Takeko Deluxe the professional eater will refuse to participate in an Eating Contest if the food is too disgusting, calling it "an insult to food." Though it turns out she's just chickening out of tasting the ultra-hot curry.
  • Everything's Better with Penguins: So says Kusuri's favorite cartoon, Pepepe no Pentaro.
  • Exactly What It Says on the Tin:
    • Yes, the series is about someone who will eventually have 100 girlfriends.
    • Within the manga, the Yakusens' drugs are named after what they do when used.
  • Excited Title! Two-Part Episode Name!: The chapter titles in the Eating Contest mini-arc use this format.
  • Excuse Plot: While the series has Rentarou actively avoid breaking his girlfriends' hearts, the whole "if your soulmates are heartbroken after meeting them, they'll die" clause that led to him going above and beyond for them only threatens to fulfill itself when Hakari attempts suicide when her mother tries to end her relationship with Rentarou. And if a girlfriend does initially reject Rentarou, it's either because they haven't gotten shocked yet, because they're fighting their feelings and will give into them later, or because it turns out they secretly like being hurt. Rentarou eventually addresses this when he talks to the Love God seventeen girlfriends later, saying that he'd rather make his girlfriends naturally want to be in the relationship rather than them staying only because they know they'd die if they reject him after locking eyes with him.
  • Extremely Short Timespan: Nearly the entirety of Volume 3 takes place over the course of a single day.
  • Eye Pop: Almost Once an Episode, someone will have this reaction to something shocking happening.
  • Eyes Always Shut: Mei has kept her eyes shut for so long she has forgotten how to open them. It's also the reason why she doesn't become a soulmate for several chapters after her introduction, as she didn't look Rentarou in the eye. Despite that, she's able to drive a car.
  • Eye Scream:
    • In the second chapter, Rentarou first gets a cookie, and then a Bocky stick, accidentally jammed into his right eye by Karane.
      Rentarou: (You got a grudge against my right eye or something...!!!?)
      • By Chapter 48, he seems to have gotten used to being poked in the eye.
    • Nano inflicts this to protect against harassment on more than one occasion.
  • Fake High: One of the Serious Group's products is Serious Kids Beer, a non-alcoholic beverage that simulates drunkenness. It first appears in Chapter 98 as part of the Kiraisugi-chou mayor's plan to sabotage the sports festival, and Rentarou intends to serve it to his girlfriends during a sleepover in Chapter 109, only to be overruled by the Big Cheese of the Publishing Biz.
  • Fictional Document: Shizuka is a fan of "Circlet Love Story", a romance novel about a princess named Io and her beloved knight Kamacle. When Rentarou confesses his love to her, she sees herself as the princess and him as the knight.
  • Finagle's Law: Invoked in Chapter 80 via Reverse Psychology. Rentarou and the girls make out on the summit in order to bring clear weather to the mountain.
  • Finger-Forced Smile: In Chapter 102, Nano and Momiji push each other's lips into smiles due to being unable to smile on their own.
  • Five-Second Foreshadowing:
  • Flag Bikini: Hakari wears an American flag bikini during an Imagine Spot in Chapter 76.
  • Foreshadowing:
    • Hakari claims in Chapter 2 that her household checks body temperature through kissing. After finding out what her mom is like, she may not have entirely made it up as an excuse to kiss Rentarou.
    • Iku gives Rentarou a massage in Chapter 33 after he helps her with recruiting calls for the baseball club, even though Rentarou feels that Iku needs one more than him. As we see in Chapter 70, Iku had her reasons for not wanting a massage.
      • Also in Chapter 33, Rentarou mentions that while he had seen Iku soliciting club members before, they hadn't actually made eye contact until that point. This would be far from the last time this scenario would play out with Rentarou's girlfriends.
    • Meme mentions in Chapter 46 that she can perform escapes on par with an escape artist if she gets embarrassed enough. She invokes this in Chapter 77 to get out from under a powerful water hose.
    • In Chapter 52, Chiyo shows Nano a copy of a volume from the manga itself to prove that heaven exists. In Chapter 61, a bookstore display can be seen with copies of volumes of the manga for sale.
    • The trope name is mentioned in Chapter 58, when Shizuka hopes that Hahari's remark about letting herself be taken in by a cute police officer upon seeing Chiyo's "freedom outfit" is not an example of the trope itself.
    • In Chapter 66, two girls pull out items submitted by Mimimi during the hot pot party. This hints that one girl's entry will be unaccounted for by the time everyone has taken their turn.
  • For Want of a Nail:
    • Rentarou being destined to have 100 soulmates happened because the God of Love was distracted by a pivotal scene in Castle in the Sky.
    • Kusuri forgetting her bento one day triggers a sequence of events that culminates in Rentarou and his family saving the baseball club from being disbanded:
      • Rentarou gives Kusuri his bento and goes to the store to replace his meal, where he meets his 7th girlfriend.
      • Said girlfriend is a Big Eater, so Rentarou signs up the family for an Eating Contest to break in the new girlfriend.
      • In the aftermath of the Eating Contest, the girls have put on considerable weight, leading them to secretly working out.
      • By the time the girls realize their struggles with their exercise regime, Rentarou has acquired two new girlfriends, one of whom is the president of the baseball club, which is facing disbandment due to all the other members studying abroad. Desperate to shed the extra pounds without raising suspicions, the other girls agree to help save the baseball club.
      • The girls' antics, combined with Rentarou's astute observations of the opposing team's pitcher and him identifying Iku's Trauma Button before the final play of the game, enables them to counteract the opposing team's cheats and win the game.
    • Rentarou only meets Nano because he forgets his phone in the classroom, thus forcing him to go back for it and leading him to meet her.
  • Fractured Fairytale: Chapter 82.5 (a special chapter released in a one-shot spinoff of the main series' magazine) is a collection of these mashed together and obliterated by RentaRomeo.
  • "Freaky Friday" Flip:
    • Courtesy of one of Kusuri's drugs in Chapter 23.
    • It happens again as a set of Imagine Spots in Chapter 76.
  • Friend to All Living Things: Yamame can make plants bloom just by holding them, and constantly has butterflies and squirrels on or around her.
  • Funny Background Event: A Running Gag in the series is someone having a fainting spell that involves their spirit leaving their body, whereupon a fellow haremette has to slam the spirit back into the body.
  • Gag Censor: Used all over the place. Of particular note are appearances from the series artist, featuring her as a giant mass of privacy-protecting Pixellation. By convention, the manga also depicts any vomit as a stream of shiny sparkles; this is lampshaded in one chapter where Kusuri invents a drug that literally turns vomit sparkly (only to be told the artist is way ahead of her).
  • Gag Series: Along with having No Fourth Wall, this manga parodies the harem genre and its tropes.
  • Game Face: The characters get these whenever they set out to enter a competition as "Rentarou's Family".
    • Mei's eyes have opened outside of Oh, Crap! moments when she's donning a Game Face.
    • Iku makes such a face almost all the time, except when utterly exhausted.
  • Gentle Giant: Yamame Yamashiki is 200 centimeters tall and a friend to all living things. Her name literally means "Kindness Mountain Woman".
  • Get A Hold Of Yourself Man: Hakari gives Karane this sort of slap in Chapter 77, when Karane refuses to leave the breast enhancing bath.
  • Giving Up the Ghost:
    • A Running Gag in the manga, which prompts a fellow haremette to slam the ghost back into the original body. (Usually Hahari loses her ghost, and Mei restores her.)
    • The entire harem gets a blissed-out version at the end of Chapter 77 courtesy of a "Serious Paradise Bath" at an onsen. In an Omake, the ghost of Father-in-Law plays goalie at the gates of Heaven and sends them back to Earth.
  • God Is Flawed: The whole situation is due to the God of Love being distracted by anime.
  • Gone Horribly Right: The Volume 5 extras reveal that Iku's older brother didn't want her to develop a quitter's mentality after being exhausted with baseball, so he told her that the fact that she worked hard and had the muscle ache to show for it meant she was improving. Iku then started associating pain with goodness, and later, pleasure, to the point where she started using the family fan to hit herself.
  • Gonk: The Vice Principal and the Gorira Alliance.
  • Gotta Catch Them All: 100 girlfriends, that is.
  • Groin Attack: In Chapter 47, Rentarou mentions that the chastity belt he is wearing will tear his groin to shreds if he starts getting erect.
  • Gyaru Girl: Aashii "Ahko" Kedarui, introduced in Chapter 87. Self-described as a low-blood pressure kinda girl (which is rare for gyaru girls), Ahko speaks with modern slang, and talks fairly sluggishly. She loves moments when she can share the same feelings with others, especially when mutually appreciating cute things like toys and keychains.
    • Because of Ahko's low-blood pressure and slowness, she doesn't over-exert herself when expressing herself, which makes it hard for her to maintain friendships because people misinterpret her as being bored or uncaring. But all she wants to do is share the same feelings with other people, which Rentarou successfully helps her with.

    H-K 
  • Headphones Equal Isolation: Kurumi wears big headphones to avoid hearing anything that would trigger her food obsession.
  • Helping Granny Cross the Street: Rentarou carries Yaku on his back while crossing the street in Chapter 85 due to the latter's fear of cars.
  • Here We Go Again!: Chapter 24 ends with Kurumi craving yet another kind of Japanese food.
  • Heroic Sacrifice:
    • In Chapters 42 and 43, each of the (at the time) current girlfriends (except Hahari) perform non-lethal sacrifices while escaping from Hahari's tentacle hair:
      • First Kurumi pushes Mei out of the way of the hair strands, and gets caught.
      • Then Kusuri throws herself at the strands (after giving Shizuka the rest of her drugs) in order to buy time for the others to escape.
      • Then Hakari pushes Karane out of the way of the strands and is ensnared.
      • Then Karane and Iku get out of the car the group is using to escape in order to push it to safety. Karane is able to help Iku escape by hitting her with a baseball bat and causing her to land on the roof of the car, but is unable to escape herself.
      • Then Iku grabs hold of the strands in order to clear a path for the others and is caught.
      • Then Mei and Shizuka lure the strands away from Rentarou, Nano and Mimimi by having Shizuka drink a drug that gives her rabbit ears, causing the strands to target her because of her cuteness (although this ends up subverted when they appear just fine in the next chapter).
      • And finally, Nano and Mimimi stay behind to distract the strands from Rentarou, who is escaping so that he can find and help Hahari.
    • In Chapter 80, Kusuri performs a non-lethal sacrifice when she pushes Chiyo out of the way of a falling branch and gets hit instead.
  • Hoist by His Own Petard: The mayor of Kiraisugi-chou switches out Sukisugi-chou's juice with Serious Kids' Beer in order to gain an advantage in the relay race. But because Mei provided refreshments for Rentarou's girlfriends, they're the only ones who don't drink it. As a result, the mayor's additional cheat attempt of oiling the girls' baton backfires spectacularly, since the other teams' batons get oiled by accident, and the girls are able to exploit the chemistry between them to handle their baton better than the other teams.
  • Homoerotic Subtext: While most of the girlfriends are solely in love with Rentarou while simply being close friends with each other, there are a few who show an equal amount of love for at least one of the other girlfriends.
    • Hakari and Karane
      • Perhaps not intentional on the artist's part, but in the very first chapter where Rentarou experiences his first "zing!", it not only encompasses them, but seems to be happening between them as well.
      • In Chapter 2, they agree to share their first kiss with Rentarou together.
      • When the two are affected by Kusuri's "Kiss the person you love most potion" in Chapter 12, Rentarou is able to escape them by getting them to kiss each other instead, which implies they love each other as much as they do Rentarou.
      • They also made out in their sleep together in Chapter 22, though they both dreamed they were kissing Rentarou.
      • There's also a small line in Chapter 28 where Hakari claims that she and Karane agreed to just stay friends when a babified Karane starts sucking on her chest, though that was in reference to a dream she had.
      • In Chapter 29, after watching Kusuri in her older form "defeat" Karane by smothering her with her breasts, Hakari takes note of the technique's effectiveness and claims she'll try it herself. When Shizuka asks whether she's talking about trying it on Rentarou or Karane, Hakari answers both.
      • In Chapter 30, Hakari forces Karane to kiss Hahari in an attempt to get Mei to open her eyes. Karane is completely against the idea until she notices that Hahari smells exactly like Hakari, after which she decides to go through with it, only for Hakari to jealously stop them from kissing at the last moment. Rentarou then lampshades how obviously jealous Hakari was, much to her embarrassment.
      • They kiss again in Chapter 41 while reeling from kissing Rentarou under the effect of the Kiss Enhancing Lip Balm.
      • In Chapter 54, the "Kiss the person you love most drug" is taken by both of them again, and the force of them clinging to each other is enough to pin a super-strength Chiyo.
      • While pseudo-drunk in Chapter 110, Hakari declares she's so sensitive she can tell whether she's kissing her beloved without even looking. First she snogs Hahari (much to the latter's delight), dismissing her with a "Not thish one.", then she kisses Karane, declaring "Yesh. Thish one.", and they stay liplocked even when they've fallen asleep on the floor.
    • Mimimi and Nano
      • Young Mimimi went gaga over Nano's beauty in a way she hasn't with anyone else, setting out to deepen their relationship and reach greater heights of beauty together (which ended up not working out).
      • When a pseudo-drunk Nano goes around giving the girlfriends headpats in Chapters 109-110, Mimimi's reaction to her headpat is ascending to Heaven accompanied by angels in bliss.
    • Mimimi and Meme
      • In Chapter 77, Meme's plan to get her and Mimimi out from under the Serious Water Shower is a self-induced Batman Gambit - she gets Mimimi to kiss her on the neck, making her so flustered she reflexively Ninja Logs out of there.
      • In Chapter 88, Meme gets very flustered at the thought of an embarrassed Mimimi in her underwear, so much so her Ninja Log ability kicks in.
      • Watching Mimimi eating her meat in Chapter 106 has Meme blushing and disappearing, much to Mimimi's confusion.
    • Hahari and Kishika
      • The two of them have scarily compatible fantasies; Hahari wants to play mommy with youngsters, and Kishika wants to be able to act like an infant. The latter's embarrassment over her secret impulses gives her a Tsundere vibe.
    • Karane and Ahko
    • Mei and Mai
      • Mai adores Mei, thinks about her constantly, spaces out around her, snoops on her, wants to monopolize her, and has cast herself as Mei's little sister. She yearns for Mei, and wants to go on dates with her.
  • Honest Axe: In Chapter 82.5, "Haharmes" offers the woodcutter a choice between a platinum axe and a diamond axe.
  • Human Shield: Both Rentarou and Kusuri take turns serving as this to each other in Chapter 74.
  • Hypno Pendulum: In the Volume 8 extras, Yamame believes her stilt-walking lessons came from the ghost of an insect she accidentally stepped on as a child, because her father hypnotized her when she refused to go outside after the incident.
  • Hypocritical Humor: In Chapter 30:
    Hahari: Meido may occasionally be diligent to an outright dangerous degree...
    Kusuri: What would you do if you were asked to drink potassium cyanide, yep?
    Mei: I would pour it down the hatch.
    Nano: You seem pretty much like an android.
    Karane: You're not one to talk.
    • In the first chapter, Rentarou is shocked that Hakari and Karane have spent four hours looking for a pink four-leafed clover, even though he himself spent the same amount of time looking for a teacher's contact lenses. In the same chapter, Karane scoffs at Rentarou for believing the school rumor that confessing one's love while holding a pink four-leaf clover will guarantee a successful confession, even though both she and Hakari spent four hours the previous day looking for pink clovers before confessing to Rentarou.
    • In Chapter 48, Hakari scolds Hahari for wanting to smooch the currently not-tsundere Karane, claiming that it would be going too far, but is perfectly happy to let Karane grope her breasts.
    • When Rentarou's cousin Chiyo is added into the harem and he explains that he got his uncle's blessing for it, Hahari is shocked that a parent would let his underaged daughter be a part of something like this.note 
  • Idiosyncratic Cover Art: Each tankobon cover features two of the girls in the order they became Rentarou's girlfriends, with Kusuri's dual forms counting as two for this (so vol. 1 is Hakari and Karane, vol. 2 is Shizuka and Nano, vol. 3 is Kusuri's dual forms, vol. 4 is Hahari and Kurumi, etc.). The exception is vol. 8, which features all the current girlfriends in their idol outfits.
  • Idiosyncratic Episode Naming: Not every chapter, but each chapter introducing a girlfriend will be named after that girlfriend. Sometimes these are straightforward Character Titles, but other times - especially when the girlfriend isn't someone in Rentarou's grade - they'll be more flowery descriptors. (Kusuri's, for instance, is "The Mysterious Senpai In The Chem Lab".)
  • Imagine Spotting: During Chapter 76, Hakari notices the Imagine Spot Yaku has about Chiyo (where she mistakes the girl for a masochist) and reacts with horror at seeing Chiyo tied up, stating that such a thing isn't legal for such a young girl.
  • I'm a Humanitarian:
    • In Chapter 56, Rentarou dreams about Kurumi eating him.
    • In Chapter 84, Kurumi has to remind herself that babies aren't food.
  • Improbably Female Cast: Justified, as should be evident from the title.
  • Incredible Shrinking Man: Nano falls prey to this thanks to Kusuri's drugs in Chapter 72. It wears off by the end of the chapter.
  • Indirect Kiss: Hakari attempts to invoke this in the first chapter, when she convinces Rentarou to drink half of the can of juice he brought for her. It fails because she accidentally spills the juice down herself.
  • Instant Taste Addiction: Exaggerated. Kurumi will start craving a food whenever she sees or hears anything that bears the slightest resemblance to it or its name.
  • Ironic Echo: Two cases involving Kurumi:
    • Rentarou first meets Kurumi at the school store despite her attending the middle school and not his high school, to which she says, “there’s no rule that says a middle schooler can’t go to the high school side store.” Later, when she is searching all over the place for a menchi-katsu sandwich, she sees Rentarou at her school store, and when she objects, he says, “there’s no rule that says a high schooler can’t go to the middle school side store.”
    • Kurumi and Hakari are paired off during baseball practice, and when Kurumi's pitch hits Hakari in the chest, she yells at her, "How exactly are you catching it?!" Hakari throws it back and it lands on the ground, and Kurumi becomes reminded of the chocolate baseballs she used to eat as a kid, getting her so hungry that she lies on the ground and bites into the baseball, causing Hakari to retort the same thing.
  • "Just Joking" Justification: Hahari claims that asking Rentarou to go out with her was just a "mom joke". She's lying.
  • Kiss of Life:
    • Inverted when Rentarou falls unconscious at the pool. Nano and Hakari's attempts at mouth-to-mouth turn into regular kissing and they need to find someone else to do it.
    • Played straight in Chapter 67, when Hahari gives Rentarou mouth-to-mouth after suffocating him with her breasts in order to win the sumo match (It Makes Sense in Context).
  • Kuudere: Eiai, who is obsessed with efficiency and rarely smiles. The other characters liken her to an Artificial Intelligence ("A.I." having the same pronunciation as "Eiai").
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    L-O 
  • Lap Pillow: The girls take turns letting Rentarou use their laps as pillow in Chapter 56, ultimately cumulating in using all their laps to make a bed for him. He ends the chapter dreaming that his lap is serving as a pillow for all the girls.
  • Laser Hallway: One is part of Hahari's security system. The lasers are arranged so there are not enough gaps for a human to fit through, so Rentarou and Karane have to go over them to get past.
  • Lie Detector: Hahari uses one in Chapter 18 in order to confirm that Rentarou's feelings for Hakari are genuine. She uses it again in Chapter 66 to ensure that nobody brings anything questionable to the hot pot party.
  • Liquid Courage: Parodied in Momoha’s introductory arc, which has Rentarou and the girls Playing Drunk:
    • Karane is notably less flustered than normal, Meme isn't compelled to use her Ninja Log for quite a while, and Chiyo is much more relaxed about things that would trigger her Super OCD, being more prone to laughter than snarling.
    • Inverted with Iku, who is more reluctant to engage in painful activities than she normally is.
  • Literal Metaphor: Rentarou thinks that he'll die from rejection; the 100 girls will actually die should he reject them or be separated.
  • Locked Out of the Loop: Rentarou has no intention of telling any of his girlfriends that they'd die if they couldn't be together with him, because he doesn't believe that their love would be genuine if they knew.
  • Long Title:
    • Well, just look at it!
    • Chapter 74 is titled "Nozawa-Sensei Already Calls Hakari's Dad 'Papari', So Should She Really Be Calling Kusuri's Dad 'Papari' Too?".
    • Chapter 100 is titled "Working on This Series Has Made Me Happier Than I Can Say. Honestly, Thank You All So Much. We're in This for the Long Haul!".
  • Lost in Translation: Chapter 76 is filled with Japanese puns that don’t translate into English, so the jokes in the scanlation are completely different from the original ones.
  • Love at First Sight: The God of Love describes meeting your soulmate as a shock running through your body and falling in love so hard that it hurts. Sure enough, it happens when Rentarou meets Hakari and Karane, as well as the other girls.
  • Love Freak: Rentarou. He says he first fell in love at eight-months old, was rejected 100 times before high school, and his favorite hobby is reading romance books. In his own words, each girl he meets is like discovering a new oil well full of love.
  • Love Potion: Kusuri gives Rentarou tea spiked with love potion when they first meet. He's so disgusted at the thought of confessing his feelings under the influence of a drug that he tries to vomit it out.
  • Maid: Mei Meido. Patient, diligent, and obedient to a fault. She's later joined by Mai Meido (no relation, not for lack of trying), who's cute, clumsy, hot-tempered, and devoted to Mei.
  • Makes Just as Much Sense in Context: At the end of Chapter 34, Rentarou strips down to nothing but a loincloth in order to give encouragement to Iku during baseball practice. Everyone else is stunned, and then the next chapter starts with everyone at the game and Rentarou fully dressed, as if the incident had never happened.
  • Marry Them All: The series' main Taglines always mention it has "zero losing heroines", after all.
  • Marshmallow Hell:
    • Rentarou suffers this from Yamame in Chapter 67.
    • A shrunken Nano suffers this from Hahari, after the latter falls on her and she gets stuck between Hahari's breasts.
  • Maybe Magic, Maybe Mundane: It's possible that Rentarou really did speak to Hakari's dead father, or it may have just been a dream. But since this is a manga where gods exist and there is No Fourth Wall, realism is not an issue.
  • Meaningful Background Event: In Chapter 79, when Rentarou and Hahari first arrive at the Teddy Baby Museum, the dolls on display have open mouths. After Hahari explains how she would French kiss her dolls as a little girl, the dolls on display have closed mouths. This is a clue to the answer to the final question of the Teddy Baby Quiz.
  • Meaningful Name: Takeko Deluxe has a hairstyle resembling a Takenoko, or bamboo shoot.
  • Meditating Under a Waterfall: In Chapter 89, both Mei and Iku meditate under a waterfall that's so cold it's only just warm enough to avoid causing hypothermia.
  • Medium Awareness: Happens a few times:
    • In the Volume 4 extras, Mei tries to avoid doing anything by leaving the book altogether, and Rentarou tears through the pages to follow her.
    • Rentarou rips the previous pages out when the credits declare Meme is the one person he couldn't save in Chapter 45.
    • Chiyo presents Nano with a copy of the manga's Baby Morph Episode to prove to her that heaven exists in Chapter 52.
    • Rentarou disposes of a narration box wondering if Yamame's a Laputian robot in Chapter 64.
  • Meet the In-Laws: While Rentarou had met some of his other girlfriends' parents before,note  Chapter 74 is his first proper meeting, as Kusuri takes him home to meet her parents, who like her usually resemble eight-year-olds due to taking her immortality drug. It goes fairly well, although Kusuri's father isn't too happy that his daughter is dating someone who has fourteen other girlfriends. At the end of the chapter, he meets Kusuri's grandmother Yaku, who also looks eight years old thanks to the immortality drug - and turns out to be his sixteenth soulmate.
  • Milestone Celebration: The 100th chapter is an In-Universe popularity poll of Rentarou's girlfriends. The first place winner is all 19 girlfriends who were dating Rentarou at the time (the initials on the comments they received making it obvious who maxed out all their tally counts) and Rentarou himself. Other characters' popularity votes were counted at the end of the chapter.
  • Modesty Towel: Rentarou wears one when bathing, just in case things get... unwholesome.
  • Moment Killer: In Chapter 110, when Mimimi compliments Mai's "beautiful brow" in her own narcissistic fashion, they have what looks for all the world like one of those moments in manga and anime where one romantic lead charms the other... only for Mai to ruin the moment by declaring out of nowhere that only she is worthy of being Mei's sister.
  • Mouth To Mouth Force Feeding: In Chapter 10, Rentarou’s body spasms prevent Kusuri from administering a neutralizer directly, forcing her to resort to Intimate Healing via this method.
  • Moving the Goalposts: The ramen shop owner keeps changing the challenge dish at her restaurant every time one of Rentarou’s girlfriends beats the challenge.
  • Multi Generational Household: Kusuri lives with her parents and grandmother.
  • Mystical 108: Chapter 108 introduces a girlfriend crippled with kleshas (impurities and desires).
  • Naked Freak-Out: In Chapter 11, Hakari has this reaction after her clothes melt off of her body due to the ingestion of a drug made by Kusuri.
  • Naked People Are Funny: Whenever a character finds themself naked in the manga, it's usually played for comedy.
  • Ninja Log: Meme can do this, using a stuffed doll instead of a log. It's a reflex whenever she feels embarrassed or nervous, and Rentarou has to break her out of doing it constantly after he confesses to her.
  • No Fourth Wall: For starters, the characters are quite aware that they are in a manga:
    God of Love: (to Rentarou) Stop repeating what I just said! You've been doing that for a while now! YOU'RE JUST WASTING PANELS!!! It's already bad enough that we've got tons of things that need to be drawn for the first chapter!!
  • Nominal Importance: Played for Laughs. Rentarou's friend in Chapter 1 is only ever referred to as Anonymous Friend "A". Not only does this establish his insignificance to the overall story, it also sets the tone for the manga as a whole.
  • Nosebleed: Rentarou suffers one in Chapter 8, when Hakari and Nano force him to fondle their breasts. Played for Drama when it causes him to pass out and nearly drown.
  • The Nothing After Death: After the ghost of Hakari's father moves on, he winds up in a black void, as seen in his next appearance. He doesn't seem to mind.
  • "Not So Different" Remark: Kurumi and Chiyo both tell Mai that they both had difficulty getting acclimated to Rentarou's Family at first for similar reasons to Mai, and Mai realizes that she herself struggled with maid training much the same way the other girls struggled with Mai's lessons.
  • Not What It Looks Like: During the slumber party, Hahari takes Rentarou to her bedroom for some "private time", complete with moaning and sighing. The others go to investigate and find Hahari dressing up Rentarou in a schoolgirl outfit, which she finds unbearably cute and he finds embarrassing.
  • No Wrong Answers Except That One: Rentarou tells Mei there are no wrong ideas for a gift for Hahari, whereupon Mei decides to sell her organs. Rentarou responds by calling that a wrong answer.
  • The Nudifier: Some of Kusuri's drugs have side effects that, in one way or another, cause the person who takes them to lose their clothes. For instance, the "become even sexier" drug makes whoever drinks it to produce a type of sweat capable of melting clothes, leaving them naked in a matter of seconds as Hakari finds out the hard way.
  • "Number of Objects" Title: The number of girlfriends Rentarou will collect. That said, it takes time to get there; the first chapter kicks off with Rentarou, Hakari, and Karane, and by chapter 108, there are 21 girlfriends.
  • Ocular Gushers: The normally uptight Chiyo will cry a river if she loses her glasses.
  • Offscreen Inertia: Iku's utter obsession with Training from Hell is shown to its fullest extent when, after the rest of the group heads home on account of it getting dark, she tells them that she's hanging back and getting a few more practice swings in. They think nothing of it, but when they arrive back at school the next day, they find her still on the baseball field swinging the bat around, and counting in the hundred thousands. She was there all night like it was nothing.
  • Off the Rails: The manga is frequently accused of this by the characters themselves whenever something bizarre happens.
  • Oh, Crap!:
    • Rentarou invokes this reaction from Mei in Chapter 30. He recounts a humiliating incident as if it happened to him, prompting Mei to laugh, and then reveals that it actually happened to Hahari, causing Mei to open those bright eyes. Subsequent Oh, Crap! moments are the only times Mei’s eyes are open, aside from the occasional Game Face.
    • In Chapter 67, Hakari easily defeats Rentarou in the sumo wrestling match, then gets naked and throws herself on top of him... then realises that the manga would not allow her to beat Rentarou that easily, and that she is the one who has lost.
    • Hahari has the same reaction when she suffocates Rentarou between her breasts, then notices that he isn't moving.
  • One Degree of Separation:
    • After Momiji is introduced, it's revealed that she's not only in Kurumi's class but they sit right next to each other. The two had never interacted before because they both thought the other was weird.
    • When Kishika's introduced, she mentions she's in the same class as Kusuri.
    • The Volume 9 bonus chapter reveals that Momiji met the Hanazonos when she was a toddler. The only reason she has any memory of the day is that she got a ZING!! with Hahari’s bust.
    • Momoha is Yamame's gardening club advisor, and she works for Hahari in the latter's role as school chairwoman.
  • One True Love: Despite the premise of the manga, Hahari deconstructs this by bringing up the corollary that only your one true love will do. She was madly in love with Hakari's father and her decision to have Hakari was so that a piece of him may live on. It was an incredibly dangerous decision that she openly admits was reckless and left her a single mother. Furthermore, she goes into detail about how losing him caused a void in her life that not even her daughter's love could fill. It was only when she fell in love with Rentarou, which proved that she could love again and disproved the notion that only that one specific person will do, that the void was filled.
  • Only Six Faces: Becomes more obvious the more characters there are, and makes it difficult to tell them apart at times.
  • O.O.C. Is Serious Business:
    • When Rapko mocks Shizuka in order to throw her off her game, Shizuka is so upset that she actually uses her own voice when apologizing.
    • If Mei's eyes are open while she's smiling, you know you're in for a bad time.
    • The first sign that something is wrong with Karane after losing her tsundere-ness is when she brushes off Kusuri being knocked into her instead of getting angry over it.
    • In Chapter 54, Shizuka is so fixated on kissing that she can't focus on the book she's trying to read.
  • Opposing Sports Team:
    • The Gorira Alliance, a group of many enormous women and one extremely feminine man, who appear in competitions against Rentarou and the girls. Hakari and Karane are surprised to see them the second time, not having expected they would ever show up again.
    • Jurassic High School is this for the baseball team, consisting of nine girls that all resemble and are named after dinosaurs. Their captain, Rapuko, likes picking on people's insecurities in order to get an advantage.
  • Out of Focus: Unfortunately, the huge cast means that not everyone can be developed all the time. Most of the girls get almost all their development during their debut arc, and thereafter are just there to deliver a few gags. However, there are attempts to avert this every so often.
  • Overly-Long Gag: Each round of the sumo tournament at the end of Volume 8 ends with Rentarou and his opponent "lovily-dovily praising each other on a fight well fought".
  • Overly-Long Name:
    • As is eventually revealed through the name of Iku's baseball team, the school that the cast attends is "Ohananomitsu University Associate Senior High School". Chiyo's introduction reveals that there's also a junior high of identical naming.
    • One of the ramen challenges in Chapter 83 is titled the "Jugemu Jugemu Gonzalezurikire Kaijohnnysuigyou-no Suigyoumatsu Unraimatsu Fully-Made-Two Kuunerutokoro-ni Nomutororo Yaburakouji-no Bra-Burglar Paipopaipo Paipo-no Schwarzenegger Shuuringan-no Guten Morgan Guurindai-no Ponpokopii-no Pen Island-no Choukyuumei-no Josuke's Just Great-as-Hell Challenge Ramen". This doubles as a Shout-Out to the famous rakugo story Jugemu.
  • Overprotective Dad: Hakari's father appears to Rentarou as a ghost with the intent to scare him. However, Rentarou's overwhelming decency and courtesy purifies Father in Law's soul and sends him to heaven against his wishes.

    P-R 
  • Page Three Stunna: Chapter 27 opens with a color picture of Hakari in a swimsuit for absolutely no reason.
  • Painting the Medium:
    • Once when Rentarou is asked what he likes about each of his girlfriends, he makes a speech so long that it requires a double-page spread and tiny font to fit it all.
    • For the fake drinking party, Rentarou makes a plexiglass sign with text declaring that no actual beer of any kind has been drunk. It appears in every single panel during the party.
  • Pair the Spares: Temporary version. Rentarou gets away from zombified Hakari and Karane by making them kiss each other.
  • Paper Tiger: Hahari is uncompromising in protecting her daughter from what she thinks are villainous men. However the very instant she feels a twinge of love she becomes a squeeing mess.
  • Parental Marriage Veto: Hakari's mother refuses to let her see Rentarou again because she believes Hakari will inevitably suffer a broken heart dating someone who is dating four other girls at the same time. This gets more complicated when Rentarou makes eye contact with her and they feel the shock running through their bodies indicating that she is also one of his soulmates.
    • Inverted with Mei. Hahari simply orders her to be Rentarou's girlfriend after the two fall in love.
    • Also inverted with Chiyo, as her father Hiro is doing everything in his power to ensure she marries Rentarou.
  • Parlor Games: One of the extras for Volume 6 depicts Kusuri and Mimimi playing Shiritori before falling asleep. Since the last words they say are their respective Verbal Tics, the only answers they can come up with all start with either 'P' or 'Y'.
  • People Jars: Kusuri uses this as an example of her "freedom outfit".
  • Phrase Catcher: Hahari and "The <blank> of a wealthy family!"
  • Pinky Swear:
    • Rentarou uses this to secure his promise not to cheat during the kissing game in Chapter 2.
    • Naddy uses this in Chapter 71 to promise Chiyo not to tell the rest of the family what she told her at McDonald's.
  • Playboy Bunny:
    • Meme dresses as one in Chapter 55.
    • Hakari, Karane and Iku dress as Playboy Bunnies in one of the extras in Volume 7.
  • Playing Drunk: Rentarou and the girls do this in Chapter 109 after Momoha joins the family. The original plan was to serve Serious Kids Beer at a sleepover, but the Big Cheese of the Publishing Biz refused to allow it, and so Rentarou set up atmospheric conditions to simulate drunkenness instead.
  • Plot Tailored to the Party:
    • It seems a little too convenient that the girls sign up for the different rounds of the Eating Contest in just the right order as to align with their respective skills, considering they don’t know the dishes ahead of time.
    • It's also too convenient that the girls showed up at the ramen shop in just the right order to overcome the owner Moving the Goalposts on beating the challenge dish.
    • The girls participate in the rounds of the sports festival that can be beaten using their unique quirks, and there are a number of unexpected elements that the girls manage to overcome using their unique quirks anyway.
  • Plug 'n' Play Friends: All the girls become True Companions with the rest of the group within a chapter of joining the harem, even Hakari’s mom!
    • A chapter is spent when Yaku joins as she tries to memorize everyone's names and histories, with humorous results when she makes mistakes.
  • Pocket Protector: Rentarou fantasizes about this, using the wooden charms with his girlfriends' faces on them. Subverted in that he moved them out of the way because he doesn't want to put his girlfriends in danger and dies anyway.
  • Poison and Cure Gambit: A pharmaceutical spy poisons Kusuri's parents to coerce their daughter into working for him, clearly planning on using her drugs for unsavory purposes. Rentarou figures the poison was a drug, and he tricks the spy into shooting a vat of the neutralization drug to restore the parents.
  • Polyamory: The entire story revolves entirely around the protagonist gaining 100 soulmates, all of whom love him and are perfectly willing to share him.
  • Pom-Pom Girl: In Chapter 70, Shizuka, Nano and Nadeshiko dress as cheerleaders during Momiji's massage of Mimimi. Shizuka and Nano dress as Japanese cheerleaders (in tracksuits, gloves and whistles), while "Naddy" dresses as an American cheerleader.
  • The Power of Love: Parodied in Chapter 26. Kurumi is skeptical that the other girls are able to eat so much just by invoking this trope, and it turns out that Rentarou has to pet them till their stomachs calm down, lest they puke.
  • The Pratfall:
    • Mimimi's skin is so smooth that she slips and falls if she's not wearing shoes on a smooth surface.
    • Yamame tends to fall over when something spooks her, accompanied by a "Thwoom" sound effect due to her large size.
  • Prefers the True Form: After the girls recover from a "Freaky Friday" Flip induced by Kusuri's drugs, Rentarou explains that while seeing the girls' personalities switched around made his heart go crazy, he still prefers the girls as their usual selves.
  • Prehensile Hair: Nano gets this briefly from drinking one of Kusuri's drugs. Hahari drinks the same drug in Chapter 42, but it reacts badly with the hair-growth drug she had previously consumed, and causes her hair to become large enough to consume the entire world.
  • Primal Fear:
    • One of the few things that can break Nano's cool demeanor is her fear of heights.
    • Yamame has a fear of fire. Just smelling smoke is enough to make her play dead.
  • Product Placement:
    • Apple and McDonald's have been mentioned in the story, with the latter making an appearance for Naddy to talk to Chiyo.
    • During a play session in Chapter 29, Kusuri feeds Kurumi a HiChew to get her to play.
    • Kurumi mentions Toppo, a reverse Pocky made by Lotte, in Chapter 82.
    • Tiffany's jewellery store appears in Chapter 83.
    • Chapter 86 features Pocky sticks, in contrast to them being called Bocky sticks in Chapter 2. Apparently, the bland name was intended as a problematic Double Entendre.
  • Public Bathhouse Scene: Chapter 77 has the family visit a mixed bathhouse before it's open to the public. Unfortunately, the place was built by the Serious Group, so all the features make it quite dangerous.
  • Pun: In Chapter 72, Nano becomes very tiny - in other words, a nano Nano.
  • Punny Name:
    • Aijou Rentarou (to use the original Japanese order)explanation 
    • Shizuka means “silence”.
    • Eiai Nano is likened to an Artificial Intelligence.
    • Hahari: "Haha" means mother in Japanese.
    • Meido, of course.
    • Iku's name, in the original order, is Sutou Iku... that is, "stoic". However, she isn't really all that stoic, being very excitable when it comes to baseball.
    • Kusuri's name is a homophone for "medicine", and the "yaku" part of her surname is another word for the same.
    • Iin Chiyo is a pun for "Class President".
  • Questionable Consent: Defied. Rentarou refuses to accept a confession if he is under the influence of a drug or he thinks a girl isn't being honest about their feelings. Chapter 85 emphasizes that last point when he admits to the God of Love that he refuses to bring up the soulmate death clause with his girlfriends.
  • Readings Are Off the Scale:
    • Iku maxes out the smack counter during the meditation training in Chapter 89.
    • The vote tallies in Chapter 100 max out at 99,999,999 votes.
  • Rebuilt Pedestal: In Chapter 90, Rentarou and Shizuka meet the author of Circlet Love Story, who turns out to be an alcoholic gambling addict. Except, not really; he's actually a rival author who is impersonating the author of Circlet Love Story as revenge for the work outselling his own. The real author is much more friendly, and she even regains her motivation to continue the series when she meets Shizuka.
  • Recursive Canon: The manga and its creators exist independently of the characters in-universe, and the manga's available in bookshops.
  • Red Herring: Toruru Kijineta is given a full name and position in the school. The fact that her blackmail photos that include Rentarou don't have him looking at the camera, as well as Rentarou not knowing of said photos when they are first presented, suggests that Toruru would eventually become one of the girlfriends. But so far, nothing has come out of that.
  • Red String of Fate: Two people who are destined to be soulmates will feel a sudden ZING!! when they meet each other's eyes.
  • Reference Overdosed: There are many, many Shout Outs, as listed here.
  • Reincarnation Romance: It is implied that Rentarou is a reincarnation of Yaku's original husband, since he sometimes sees her as she was when she was married.
  • Reveling in the New Form: In chapter 23, the girls switch bodies with one another following a drug accident. All the girls embrace their predicament, with the only exception being Nano.
  • Right Out of My Clothes: In Chapter 67, it took less than one panel for Hakari to remove all the clothes she was wearing, even though it all turned out to be just part of a dream of hers.
  • Rousseau Was Right: Though there are a few exceptions, for the most part the manga depicts even the most throwaway of jerks and bullies as well-meaning people deep down; in particular, any young males who antagonize Rentarou are usually explained as trying to please their own girlfriends.
  • Rule of Three:
    • In Chapter 34, Kusuri tries to play catch with two catching gloves, and later tries to use three bats at once. In the bonus page, she tries to clean the field with two rakes. All three times when she's called out on it, she responds with "But it's so cool..."
    • In Chapter 56, Rentarou throws himself awake from three dreams where he gets intimate with one of his girlfriends.
    • In Chapter 84, the phrase "this lifeform would perish" appears three times; twice thought by Nano if nobody protected it, and then the ending tag if nobody comforted it.
  • Rummage Fail: In Chapter 48, Kusuri accidentally grabs a "tsundere unmaker" drug while looking for a neutralization drug.
  • Running Gag: A whole lot in fact.

    S 
  • Salt Solution: In Chapter 85, Rentarou attempts to drive the God of Love away with salt.
  • Scenery Censor:
    • In Chapter 67, after Hakari gets naked, the only thing covering her body is the Written Sound Effects of the manga, which act as a sort of Censor Suds.
    • In Chapter 80, when Meme's bangs are blown away by strong wind, Nano offers to use her own billowing hair as a cover.
  • School Festival: One occurs in Chapter 63.
  • Screw Yourself: The cover of Volume 3 has both of Kusuri's forms getting touchy-feely.
  • Second Place Is for Losers: At least for the Rentarou family, taking second is pretty much just "first loser", especially for a series whose tagline is "the romcom with zero losing heroines". Best exemplified in the 100th chapter, where everyone was nervously looking over the results of an in-universe popularity poll and anyone who hadn't been called yet agonized over the possibility of not being #1. They all won, including Rentarou, so that was a moot point.
  • Self-Deprecation: Two guys in Chapter 61 at a bookstore display with copies of the manga itself call the title “cringy as hell” and mention the creator wanting to crawl in a hole and die due to being “too ahead of the curve”. Later, one of Chiyo’s classmates in Chapter 71 says that 100GF is more expensive and worse for the brain than cigarettes.
  • Serious Business: The aptly named Serious Group, who go well above and beyond with all of the products they sell, often causing problems for people unaware of their practices.
  • Shapeshifting Excludes Clothing: Kusuri's drugs that de-age or shrink people play this straight in both directions.
  • Shared Dream:
    • In Chapter 109, the Big Cheese of the Publishing Biz confronted all the girls in their dreams to overrule their plan to serve Serious Kids Beer at a sleepover.
    • In the Volume 11 extras, Meme and Karane both dream about switching bust sizes.
  • Shout-Out: A plethora of them, being a Gag Series and all.
  • Shrinking Violet: Meme hates being noticed, so she grew out her bangs to cover her face and acquired a reflexive Ninja Log technique to quickly hide when she feels nervous. She has an admiration for Mimimi who loves being the center of attention.
  • Simple Solution Won't Work:
    • In chapter 34, Karane suggests that Hahari could use her authority as the school chairwoman to prevent the baseball club from being disbanded. Hahari refuses to give the club any special treatment, since she would have to do the same for all the other school's clubs in order to avoid playing favorites.
    • After Rentarou secured 18 girlfriends, he goes to the shrine of the Love god that "granted" him the 100 soulmates boon. While the god is remorseful, he asks why Rentarou simply doesn't tell his soulmates that they need to be coupled with him for the sake of their life (as if they make eye contact but the girl truly rejects Rentarou for any reason, the bad karma from doing so will kill her). Rentarou responds that if he did, he's basically be coercing all of his girlfriends into a relationship regardless of their wishes, and he'd rather be in a relationship where they want to stay with him naturally.
  • Sliding Scale of Plot Versus Characters: The overarching plot revolves around Rentarou being destined to have 100 soulmates and his efforts to ensure that all of them are happy with him, and the manga puts considerable effort into fleshing out the soulmates in question.
  • Soft Water:
    • Rentarou saves Hakari's life by redirecting their fall towards a swimming pool instead of the hard ground.
    • Averted when Kusuri almost falls off the roof by accident. They are all terrified for her safety, despite the pool being directly below. Fortunately, Rentarou pulls her up, and all the other girls have his back.
  • Solo Mission Becomes Group Mission: When Rentarou makes his plan of rescuing Hakari from her mother known to the other girls, they all decide to join him in his mission.
  • Someone to Remember Him By: Hahari got impregnated at age 13 because her lover had a terminal disease. Deconstructed, as by necessity for this trope, Hahari was left a single mother once Hakari's father actually passed on, and while she loves Hakari deeply, it was a task that took her complete devotion.
  • Spaghetti Kiss: Invoked in Chapter 86 when the whole family plays the Pocky Game. Karane and Hakari wind up having their candies connect end to end and both think they're kissing Rentarou.
  • Spiritual Antithesis: To a manga that started getting serialized right alongside it, Girlfriend, Girlfriend. Both are wacky gag-based harem romantic comedy manga, both have devoted and straightforward male leads, both have everyone admit that what they're doing would be considered cheating in any other relationship, and both have the girls try to make the relationship work as the harem grows. However, there are key differences; while the attraction is supernatural in 100 Kanojo, everyone is genuinely in love and they are willing to make friends with the rest of the harem, eventually piling up into a family dynamic. Rentarou also has energy to spare so his girlfriends never have to feel like they're left out of the loop. In contrast, Girlfriend, Girlfriend has the love happen naturally, but it focuses on the problems with a harem; that the girlfriends he has do in fact want to monopolize their man's attention even if they like the other girls, and explores what happens if a haremette wants him all to herself or when he can't keep up with their needs and his own selfishness. The harem is also much smaller and he only intends on dating two of them.
  • Spit Take:
    • Karane in Chapter 9 when Rentarou mentions her staring at Hakari and Nano's busts.
    • Naddy in Chapter 71 when Chiyo reveals that some of her classmates are underage smokers. She tries to hide it by claiming she can't handle soft drinks.
  • Squee:
    • Hahari does this whenever she experiences a Cuteness Overload.
    • Kurumi does this whenever she gets the food she's craving.
  • Staircase Tumble: Rentarou tumbles down an escalator from seeing Iku in a dress in Chapter 60.
  • Stating the Simple Solution: Karane asks whether Hahari can just exert her authority as chairwoman of the school to keep Iku's baseball team open despite it having only one member. In a rare act of maturity and responsible behavior, Hahari refuses to give the club any special treatment, because if she were to make an exception for one club, she would have to do so for every club in order to avoid playing favorites.
  • Stripperific:
    • Hakari's idea of a "freedom outfit" is a ribbon wound around her body to hide her private parts and melted chocolate hearts painted on her bare skin.
    • Meme wears the same outfit (minus the hearts) in an Imagine Spot in Chapter 76.
  • Sunglasses at Night: Rentarou wears these in Chapter 75, while trying to be manly.
  • Super Speed: The Vice-Principal, to the point where she's been called "The Hag Closest to Supersonic Speeds in this World".
  • Surprisingly Realistic Outcome:
    • Kurumi is just a kid, so she can't enter an Eating Contest on her own without parental supervision. Fortunately, there Ain't No Rule that she can't join on a team with seven other people, one of whom is an adult.
    • When the girls join Iku's baseball team, Hahari, Mei, and Kurumi can't, because they aren't high school students. Hahari and Mei are adults, and Kurumi is in middle school. Fortunately a little pleading from Rentarou and a very relaxed referee gets them to play anyways.
    • The brief interlude where Toruru blackmails Hahari is an indicator of the fact that yes, what Hahari does on a normal basis would be a crime in a more realistic manga, and if word were to get out that she was in a poly relationship with students from her school (up to and including her own daughter) and several middle schoolers, everyone would be destroyed by the social fallout.
    • After attacking a pair of Chiyo’s classmates to get them to stop smoking in the park, Naddy is confronted by two police officers called in response to the commotion she caused.
    • The bocky sticks in Chapter 86 are made extra long so the bocky game contestants wouldn't know who grabbed the other end, but they all break under their own weight as soon as the game starts.
  • Suspiciously Specific Denial: Karane denies to Rentarou that she and the other girlfriends (absent Shizuka) tried to peep on him when, as far as he was concerned, they were not doing anything. This immediately tells him what actually happened and the other girlfriends actually facepalm at Karane.
  • Sweater Girl: Meme wears a nice black turtleneck at all times.

    T-Z 
  • Take That!: In Chapter 26, Rentarou calls bubble tea "pandering to selfie culture".
  • Taste the Rainbow: The more girlfriends join the harem, the straighter this gets played.
  • Tears of Joy: Rentarou is prone to doing this frequently. In one chapter when the girlfriends reaffirm their love for him, he cries so much the rooftop gets flooded.
  • Technicolor Eyes: Mei has hypnotic, rainbow colored eyes.
  • Thanks for the Mammary: Rentarou accidentally gropes Hakari's breasts during the kissing game in Chapter 2.
  • That Came Out Wrong: In Chapter 66, Mei pulls what looks like a rear end out of the potluck, and Rentarou announces that that's what he added. He then has to quickly clarify that it was supposed to be heart-shaped ham, and that the bottom part must have gotten cut off.
  • Thunder Shock: Accompanies a "Zing!" sound effect whenever Rentarou locks eyes with a Soul Mate.
  • Title Drop: Karane and Rentarou in Chapter 18 when subjected to Hahari's lie detector chair.
  • Tongue Suicide: Mei attempts this in Chapter 59 after accidentally breaking a drug vial intended to help the girls escape the photo booth.
  • Tournament Arc: Parodied with the Eating Contest starting in Chapter 25, which has multiple rounds and a system of Scoring Points, such that actual strategy is required, and ignoring that one would be sated very quickly in reality.
  • Training from Hell:
    • The Gorira Alliance regularly set off fireworks in their mouths as training to eat spicy food.
    • Iku actively seeks out opportunities to do this, as part of her belief that pain is good for you.
  • Transformation Sequence: In Chapter 29, Kusuri takes the neutralizer to turn back into her 18-year-old self, and calls out, "Transformation sequence!"
  • Trauma Button: After Nano gets shrunken in Chapter 72, Yamame puts her stilts on and nervously tells herself that she isn't gonna step on Nano. Yamame wears stilts in the first place because she stepped on a bug when she was young.
  • Trivial Tragedy: When she was a little girl, Yamame accidentally stepped on a bug, squishing it. The incident devastated her so much that her father had to hypnotize her in order to break her out of her guilt-ridden state, and then teach her to walk on stilts so she could feel more comfortable about working in the garden.
  • True Companions: Chapter 99 is a showcase for how the harem has become this for its members; they've spent so much time together, and have become such close friends, that they're able to operate in sync without communication. The efforts and expectations of the rest of the harem encourage each member to do their best.
  • Tsundere:
    • Karane Inda, to parodic degrees. This includes being a Bad Liar.
    • Kurumi Haraga is grumpy and hostile to everyone when she's hungry, but apologetic and demure when fed.
    • Kishika Torotoro tends to react with hostility if she thinks she'll be provoked into an infantile state.
  • TV Genius: Kusuri is able to invent drugs that can do anything, such as magnetizing the iron in your blood, accidentally turning people into kissing-zombies, deaging herself and her family to children, and swapping people’s bodies. And all of them can be neutralized with a single Magic Antidote. Rentarou even calls her "Doraemon" at one point.
  • A Twinkle in the Sky: The pharmaceutical spy becomes this in Chapter 74 after being punched by Kusuri's father.
  • Two-Timer Date: Rentarou thinks that he can 100-time all his girlfriends. He quickly rejects the idea as it would be cruel.
  • Unaffected by Spice: The Yakusens test various prototype drugs on themselves on a regular basis, resulting in this trope.
  • Undying Loyalty: Mei's complete devotion to Hahari is a result of her Dark and Troubled Past having virtually obliterated her sense of self. Not only can almost nothing catch her off guard, but she literally can't understand the concept of not following orders.
  • Unexpectedly Obscure Answer: The Teddy Baby quiz is composed entirely of this sort of question.
  • Unfortunate Search Results: Rentarou tries to search online for stories about people's lives being ruined by cabbage addiction when the girls get addicted to addictive cabbage. But because the situation Makes Just as Much Sense in Context, his search yields zero results.
  • Unlimited Wardrobe: Hahari loves dressup and has a gigantic closet filled with everything from costumes to baby clothes. If she doesn't have something specific, she'll pay for it to be tailored overnight.
  • Unspoken Plan Guarantee: Rentarou comes up with a convoluted and detailed scheme to use blindfolds, dice rolls, and careful choreography to completely obfuscate which of Hakari or Karane he kisses first. Naturally something spoils every attempt and they eventually give up (after a lot of pain and embarrassment on all sides).
  • Unstoppable Force Meets Immovable Object: In the sports festival arc, Uto is tasked with producing a spear that can pierce any shield and a shield that can deflect any spear. Her answer? A plastic fork and a paper plate. She reasons that the strongest spear wielder could pierce anything with a plastic fork and the strongest shield bearer could deflect anything with a paper plate. And it works.
  • Unusually Uninteresting Sight: Granted that a lot of the mains' weirder adventures tend to happen away from the general populace, and the whole world got covered in one person’s hair at one point, but this still crops up several times. Chapter 72, for instance, has Nano going through a whole school day six inches tall without raising a single comment from anyone outside the mains.
  • Verbal Tic:
    • Kusuri has a habit of saying "yep, yep!" at the end of her sentences ("nanoda!" in Japanese), which was originally translated as "yeppers!". She even says it in her sleep.
    • The leader of the Gorira Alliance adds "uho" to the end of her sentences.
    • Mimimi adds "naturally!" to the end of her sentences. She even says it in her sleep.
    • Naddy tends to say “ya hear?” at the end of her sentences quite a bit.
    • Yamame is prone to saying "aye" quite a lot.
    • It seems to run in Kusuri's family. Her mom says "Mm-hmm" and her dad says "uh-huh".
    • Yaku adds "yes yes!" to the end of her sentences ("nanoja!" in Japanese).
    • In Chapter 71, Akogare and Manesu add "bloomin' tosser" and "bleedin' muppet" to the end of their sentences, respectively.
  • Violence is the Only Option: Naddy believes this in Chapter 71, suggesting that Chiyo beat up her classmates if they refuse to listen to her about smoking. Chiyo reprimands her, telling her that violence is out of the question. Pages later, Naddy threatening to tie them up and Chiyo head-butting Naddy to stop her is what straightens them out.
  • Vomit Discretion Shot: Takeko Deluxe throws up after the Eating Contest, but her vomit is pixellated.
  • Wall of Text: Played for Laughs in Chapter 37. After each of the current girlfriends tell Rentarou all the things they love about him, Rentarou fires back with a massive two-page list of every single thing there is to love about them.
  • Wardrobe Malfunction:
    • Both Rentarou and Iku lose their clothes to Terano's fastball.
    • In Chapter 78 this happens to Hakari. She's uncharacteristically embarrassed because a dirty rooftop is not a sexy setting to bare herself.
  • Weaksauce Weakness: The "Soulmate Sense" doesn't go off unless both Rentarou and the prospective soulmate make eye contact and can see each other clearly. The first time this is shown is with Hahari, where despite having a clear line of sight with each other and having a conversation, it isn't until the drug he took to see infrared wears off and he can see her that the "sense" goes off.
  • We Want Our Jerk Back!: The three-chapter arc leading into Ch. 50: After Karane loses her Tsundere-ness thanks to a drug, while everyone is charmed by her new sweet behavior at first, they soon all agree that they prefer the old her.
  • Weight Woe: Played for Laughs at the start of Iku's intro chapter, where all the girlfriends realize the Eating Contest from a few chapters ago did, in fact, leave its mark. Hence, they go off to do some "secret cuteness training" (even dragging along Kurumi, whose metabolism defies weight gain, and Mei, who hadn't even participated), allowing Rentarou to meet Iku by himself.
  • Wet T-Shirt Contest: Hahari organizes one—but with Maid uniforms instead of shirts.
  • Wham Line:
    • From the end of Chapter 14: "Rentarou-kun...would you...please break up with me?"
    • From Chapter 57: "You really are Japanese, aren't you?"
  • Wham Shot:
    • The last panel of Chapter 17, where Rentarou Zings with Hahari, showing that his girlfriends won't just be girls his own age.
    • At the start of Chapter 51, Rentarou Zings with Chiyo, showing that his girlfriends include relatives of his own family.
    • Subverted in Chapter 74. Kusuri invites Rentarou to her home to meet her parents. Aware of the previous two Wham Shots, Rentarou braces himself for a Zing with Kusuri’s mother... and nothing happens. But then, Kusuri’s grandmother comes home andZING!!
  • Who Writes This Crap?!: In Chapter 35, Karane yells "Screw this manga!" when the opposing team openly cheats during a game.
  • Wingding Eyes: Many characters get heart eyes when experiencing extreme loving emotions; this's best shown on the manga covers, where every girl with visible eyes has heart eyes.
  • World Limited to the Plot: Only a handful of girls have appeared in the manga well before they joined Rentarou's harem.
  • World of Technicolor Hair: Seen whenever the series ventures into color. The Hanazonos have pink hair, Nano has silver hair, Naddy has light green hair, Yamame has deep green hair, Momiji has purple hair, Ahko has pale blonde hair shading to pink at the ends, and Uto's hair goes from dark blue-green to aqua. (Shizuka's finalized hair color may also count if seen as dark blue rather than a shade of black.)
  • Wrestler in All of Us: Karane performs various holds on Rentarou when she's embarrassed.
  • You Have GOT to Be Kidding Me!: Rentarou's reaction to getting love shocked at the sight of his cousin Chiyo Iin.
  • You Were Trying Too Hard: The ramen shop owner kept trying to change the restaurant’s challenge dish every time someone beat it, unknowingly catering each new iteration to be beaten by a different girlfriend.
  • Zany Scheme: Rentarou is prone to these in order to please his ever growing harem. Examples include:
    • Setting up a convoluted game to prevent his first two girlfriends from feeling jealous of the other having his first kiss. (It doesn't work out.)
    • Copying an entire book series by hand for a text-to-speech app for another girlfriend's phone.
    • Breaking into the home of a wealthy family to rescue a girlfriend whose mother wants to cut all ties with him.
    • Improvising a particular recipe to satiate a girlfriend's appetite, burning himself in the process.
    • Stripping down to a loincloth to prevent a girlfriend from overworking herself from training for an upcoming game.
    • Hideously deforming himself during a beauty seeking contest in order to force a draw between the contestants.
    • Setting up a Body Double to satisfy a girlfriend's desire for a French Kiss without her getting a headstart on him.
    • Sewing and rigging multiple life-size puppets to make the audience bigger during a concert.
    • Standing all his girlfriends on dirt piles to placate the newest addition's height insecurity.
    • Helping Nozawa-sensei draw the manga to tense up his body so that his new girlfriend can practice massaging males.
    • Developing a DJ persona and routine to convince middleschoolers not to smoke. (Fortunately, he doesn't wind up needing to use it.)
    • Studying an old kids show front to back in order to pass a trivia game during a date.
    • Removing numerous degenerates from a forest to prevent them from crossing the paths of his most kindhearted girlfriends.
    • Staging atmospheric conditions to bypass the publisher forbidding the girls to drink fake beer.
  • Zettai Ryouiki: This is Momiji's favorite part of Naddy, the space between her shorts and chaps.
  • Zombie Gait: Inverted in the kissing zombie arc. The kissing drug that turns the girls into kissing zombies actually makes them run faster than normal.

Alternative Title(s): The 100 Girlfriends, Kimi No Koto Ga Dai Dai Dai Dai Daisuki Na 100 Nin No Kanojo

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