Characters that appear in Masamune-kun's Revenge.
Beware of spoilers
open/close all folders
Masamune Makabe
Formerly a fat kid, his history of bullying, culminating in being rejected by his childhood friend Aki, who called him a "Pig's Foot", instilled in him a burning desire for vengeance, going so far as to subject himself to intensive training under his martial artist grandfather, emerging after eight years as a handsome, popular high-school boy.
- Academic Athlete: He got full marks in his transfer exam and excels in sports.
- Accidental Pervert: When Aki is changing out of her cosplay, Masamune hears her crying in frustration and ends up seeing her in her underwear because he went into the dressing room to check on her.
- Allergic to Love: In the last stretch of the series, he suddenly breaks into hives whenever girls directly touch him, and starts showing symptoms of it after he and Aki start dating. The only exception to the rule is Yoshino, and he realizes that it's because he enjoys being around her. Neko speculated that the reason for it is purely psychological; his body is negatively reacting to the sudden dropping of his series-long goal after finding out he never had any reason to hate Aki.
- Alliterative Name: Masamune Makabe.
- Beautiful Tears: When they were children, Masamune cried when Aki told him her parents were going through a divorce. Aki thought he was sweet and cute because he cried for her, which is one of the reasons why she developed a crush on him.
- Belated Love Epiphany: After Aki finally agrees to be his girlfriend, Masamune isn't sure if he really loves her since he originally only wanted to dump her for rejecting him first, but the revelation that Aki didn't do that took away his reason to hate her. Towards the end of the series, Aki breaks up with Masamune because she thinks he doesn't love her, but this leads to Masamune realizing he does love Aki and asking her to get back together with him.
- Beneath the Mask: Sure he may be attractive now, but he's still the same immature guy in the inside, and has massive social anxiety.
- Best Served Cold: His entire plan is to find Aki, charm her into falling in love with him, and then cruelly reject her when she confesses, all for the bullying done from her insult eight years ago. Sounds devilish on paper, but when he actually has opportunities, he never goes through with it because he doesn't want to hurt her.
- Betty and Veronica: He's the Archie torn between Aki (Veronica) and Neko (Betty). Yoshino later becomes his Cheryl.
- Bridal Carry: Attempts this with Yoshino after the latter sprains her ankle. This causes her to react and she sends him flying a few feet with a punch from her brass knuckled hand.
- Broken Ace: Masamune is smart, handsome, and athletic, and he knows it. However, he still has several self-esteem issues due to being bullied in the past.
- Bully Magnet: In his childhood, other kids bullied him for being fat.
- Casual Kink: He has a relationship with Yoshino in which he calls her Master, while she calls him Pig's Foot. Were it not for the fact that Pig's Foot was an insult from his past and Master being his nickname for Yoshino because he's learning from her, one could construe that they are in an S&M relationship.
- Chick Magnet: After getting handsome, almost every girl he meets gets a crush on him.
- Childhood Friend Romance: He wants to date his childhood crush, Aki. Initially, it's all a scheme to get back at her for rejecting him when they were kids. Then it becomes a Double Subversion when they do fall for each other in the present. He later discovers Yoshino tricked him into thinking Aki rejected him, making him lose motivation for revenge, and he eventually realizes he does love Aki. The series ends with Masamune confessing his love for Aki and asking her to be his girlfriend.
- Deadpan Snarker: He constantly makes sarcastic remarks to people around him, whether it be Aki being a thick headed moron, Neko's tendencies to act like she came out of a romance manga, or Yoshino's tendency to switch between her personas of being a meek servant and a scary chessmaster.
- Dreadful Musician: Masamune's singing is so terrible that it causes everyone to pass out in the karaoke room.
- Embarrassing Nickname: The motive of his revenge is Aki humiliating him by calling him "Pig's Foot".
- Fitness Nut: Due to his grandfather putting him through strict training to make him slim down, Masamune is obsessed with working out at home, to the point his bedroom looks like a personal gym. He's also very insistent on only eating high-protein, low-calorie foods, which is a problem when his mother loves cooking meals high in calories.
- Forgotten Anniversary: In the sequel, Masamune's college and job at the gym are keeping him so busy that he forgets his dating anniversary with Aki, much to her dismay. He soon realizes his mistake and apologizes.
- Formerly Fat: As a child, he was pudgy. After a harsh experience with Aki, he swore to get himself a makeover, going so far as to subject himself to a strict diet plan (which would involve rejecting the sweets his mother and younger sister often eat).
- Freudian Excuse: His goal to get revenge is obviously as a result of Aki rejecting him many years ago. Not to mention he was already bullied beforehand.
- Giftedly Bad: Masamune singing karaoke causes everyone in the room to collapse in agony. He thinks his singing voice moved them so much that they're lost for words.
- Heroic BSoD: When he reveals his true identity to Aki and she agrees to date him, Masamune literally shuts down when it finally hits him that he spent eight years obsessing over a "revenge" plot to get back at Aki, only to find out she wasn't really the one who hurt him. To make it even worse, all his efforts to get thin and make Aki fall in love with him were seemingly a waste of time because she already liked him when he was fat. Afterwards, Neko recognizes Masamune is suffering from burnout syndrome due to the shock.
- I Hate Past Me: Despite Aki's subtle urging to return to being the past version of himself, Masamune just doesn't want since he's worked too hard to get to where he is now to throw it away. At the end of the series, he comes to terms with his past self thanks to Aki fully accepting and loving him for who he is both in the past and present.
- Inferiority Superiority Complex: Underneath his confidant exterior, Masamune is still the awkward shy kid he was mixed in with years of spite to the people that made fun of him.
- Informed Attractiveness: He may be miles from where he used to be as a child, but besides the muscles we see from time to time, he doesn't really look any better or worse than most other male anime romcom protagonists out there.
- Insecure Love Interest: When Aki finally accepts to be his girlfriend, Masamune feels constantly insecure as he's scared that his current self isn't enough for Aki to love him. Aki unwittingly feeds into his insecurities when she projects her image of Masamume's childhood self onto his present self, even insisting he should eat more and gain back some weight. After Aki helps him face his former bully and she accepts him for who he is now, Masamune gets over his doubts and realizes he really wants to be with Aki.
- Insult of Endearment: He gets called "Pig's Foot" by Yoshino, despite him hating the name. He slowly does shrug it off and the name is basically Yoshino's nickname for him. Also serves as foreshadowing to the fact that Yoshino was the one to come up with the name instead of Aki as Aki doesn't remember the name, but Yoshino does and constantly uses it.
- Intentional Heartbreaker: His revenge plot is to make Aki fall in love with him so he can dump her after the fact. It's subverted when he finds out Aki wasn't the one who called him "Pig's Foot" when they were children, making his revenge null, and eventually, he realizes he has fallen in love with Aki, becoming her boyfriend for real.
- Irony: For the majority of the series, his goal is making Aki fall for him to then reject her and get back at her for calling him "Pig's Foot" when he was a kid. At the end of the series, he unwittingly did make the girl who called him "Pig's Foot" fall for him and he rejects her, except the girl is Yoshino instead of Aki.
- Jerk with a Heart of Gold: He's self-centered, full of himself and grudgeful, but not a bad guy. Despite claiming he will take revenge on Aki over and over again, he can't bring himself to do something that would actually hurt her and ends up coming to her aid more often than not.
- Long-Distance Relationship: In the sequel, Masamune's relationship with Aki seems to be on shaky ground because she moved out of town to go to college in Hokkaido, but they prove they're still committed to each other and want to make their relationship work. At the end, Masamune gives Aki an engagement ring and promises to wait for her to graduate from college so they can get married.
- Love Martyr: He pretty much gives up all his ambitions just to be with Aki after Yoshino admits she was the one behind their separation as children, which is putting a strain on him mentally, given that she keeps unwittingly imprinting her images of the old Masamune onto him, but he keeps going ahead with it because he empathizes with her for trying so hard in their relationship. To Aki's credit, she realizes she has been causing stress for Masamune and breaks up with him because she honestly believes Yoshino can make Masamune happier than she can, which ultimately leads to Masamune asking Aki to get back together.
- Loving a Shadow: Neko theorizes that Masamune has fallen out of love with Aki by the time they start dating and he's forcing himself to be with her out of attachment to the relationship they had as kids and guilt over abandoning her and wanting revenge against her for something she never did. In the end, however, it gets subverted when Masamune and Aki realize they have come to love each other's past and present selves.
- Misplaced Retribution: For years, he has been planning a revenge plot against Aki because she insulted him when he was a kid. Then he discovers Aki wasn't the girl who called him "Pig's Foot", it was Yoshino disguised as Aki. Ironically, Masamune technically succeeded in his revenge, just not in the way he expected; Yoshino ends up falling in love with him, but Masamune rejects her because he has realized he does want to be with Aki after all.
- Narcissist: His younger sister Chinatsu calls him a narcissist because of his habit of checking out his post-makeover body.
- The Nicknamer: He's more subtle about it than Aki is, usually only using the nicknames for people in his head, but he thinks of his classmates bu their nicknames if they have them, and he's come up with a few himself, like calling his mom "loli-hag." Aki is even entered in his phone as "Cruel Princess."
- Nom de Mom: His original family name is Hayase. After slimming down, he changed it for his maternal grandparents' last name, Makabe, so no one in his hometown can recognize him in case someone remembers him from the time when he was fat.
- Otaku: He accidentally becomes one for shojo manga while researching pick up lines to use on Aki. Ironically, he becomes scared of Otakus after being traumatized by Muriel and her brother.
- Petty Childhood Grudge: For eight years, he has been bitter about getting called "Pig's Foot" by Aki. After growing into a slim and handsome teenager, he resolves to take revenge on Aki by making her fall in love with him so he can reject her.
- Post-Stress Overeating: Despite his efforts to stay fit, he binge eats junk food and snacks when he's anxious, usually because of Aki. He regrets it when he sees he has gained back weight soon after.
- Pretty Boy: Post-makeover, he's considered to be a natural ladykiller with his looks.
- Private Tutor: He personally tutors his friend Kojuurou who is so bad at studying that he only gets single-digit grades until Masamune starts to help him.
- Raised by Grandparents: After Aki's rejection, Masamune went to live with his grandfather who put him through arduous training to become fit. He went back to live at his parents' house when he enrolled at Aki's high school.
- Real Men Hate Sugar: He avoids eating sugary and fatty foods, attributing his former fatness to his mother's cooking (where she throws in a lot of fatty and sugary stuff in them).
- Rescue Romance: He developed a crush on Aki after she helped defend him from his bullies, but she rejected him. Years later, Masamune invokes this by defending Aki from one of the guys she rejected.
- Secret-Keeper: Upon discovering Aki is a Big Eater, Masamune promises to not tell anyone about it. He took it into account in case he needs blackmail material, though.
- Sensitive Guy and Manly Man: The Manly Man to Kojuurou's Sensitive Guy. Masamune is a handsome guy who is obsessed with physical fitness, while Kojuurou is a cute, girly-looking boy who loves sweets.
- Spotting the Thread: After learning that Aki has no knowledge of the insulting nickname she supposedly gave him, Masamune's musing on perspective cause him to reconsider the idea that she was the one involved, recalling that there was one other child (Yoshino) in the mansion he did not know of at the time and she somehow knows about the nickname when Aki doesn't....
- Troll: Though not to the level of Yoshino, Masamune enjoys messing with Aki by catching her off guard with his advances.
- Unwanted Harem: He's the object of affection for Aki, Tae, Neko and Yoshino.
- We Used to Be Friends: He was very close to Aki when he was a kid, even having a crush on her. After she called him "Pig's Foot" and told him she would never like him back, he cut all ties with her and spent years planning to take revenge against her. After Yoshino reveals she was the one who insulted him to drive him away from Aki, Masamune slowly amends his relationship with Aki.
- Why Did It Have to Be Snakes?: He totally freaks out at the sight of a spider.
Aki Adagaki
A rich girl who used to be friends with Makabe when they were children, but suddenly told him to go away and called him "Pig's Foot". Haughty and a bit stuck up, and has a sour opinion of men.
- A-Cup Angst: A bonus chapter shows her getting seriously offended when some guy taunts her small breasts.
- Adaptation Dye-Job: In the manga, she has black hair, but it was changed to blue in the first anime season. The second season gives her hair the shade of black from the manga.
- Alliterative Name: Aki Adagaki.
- Aloof Dark-Haired Girl: Aki is a black-haired beauty who is known for her popularity and cold treatment of others, especially men.
- Auntie Pennybags: After she graduates from high school, Aki makes a big donation to the school, with a large portion of the money going to the cafeteria. Chinatsu is grateful because now the school's food is better than ever.
- Aw, Look! They Really Do Love Each Other: Aki is usually flippant of Yoshino as anything other than her maid, but she does personally patch up her Twisted Ankle out of genuine concern in Chapter 44. She also shows some genuine concern for her as a child while Yoshino is sick.
- Betty and Veronica: The Veronica to Neko's Betty. Aki is the harsh Tsundere who Masamune resents for supposedly rejecting him in the past, but he's still attracted to her more vulnerable side. When the much nicer Neko appears to pursue Masamune, he rejects her because he can't give up on Aki.
- Big Eater: Aki has an enormous appetite, a fact that she doesn't want anyone but Yoshino to know about. Masamune finds out when he catches her eating a jumbo bento for lunch, and it was her fourth one that day.
- Broken Bird: Her parents' divorce and Masamune's apparent abandonment afterwards left deep emotional scars in her, resulting in her current cruel personality and strong hatred towards men.
- But for Me, It Was Tuesday: Subverted. When hearing Aki say her fat friend just stopped coming to see her with no explanation, Masamune is pissed that Aki has forgotten the part where she called him "Pig's Foot". Later on, Masamune pieces together that Aki didn't forget about it; she really didn't do it in the first place. The only one who has ever called him "Pig's Foot" is Yoshino.
- Childhood Friend Romance: She was Masamune's childhood crush who rejected him for being fat, but the truth is she did like him back and Yoshino was the one who tricked him to drive him away from Aki. Masamune initially gets close her to get revenge by dumping her, but they slowly develop true feelings for each other again. After they have cleared their past misunderstandings, they become a real couple.
- Childhood Friends: Played With. Yoshino has been together with Aki since they were babies, but their relationship is still more akin to mistress-servant. In the final stages of the series, Aki starts treating Yoshino as a friend.
- Chubby Chaser: She thought the chubby Masamune was cute and after she begins going out with Masamune, she keeps giving Masamune food so he gets fat again. It's probably a case of familiarity and Single-Target Sexuality, since her fondest memories were with little, chubby Masamune. After Masamune shows her that he has dedicated years to slimming down because he hated being fat, Aki understands that if she wants to date Masamune, she must accept the new well-built version of him and she does at the end.
- Clingy Jealous Girl: Downplayed. She becomes jealous when Neko gets close to Masamune, although rather than possessiveness, Aki wasn't sure she could trust Masamune because he was obviously keeping secrets from her. Later on, she tries to step aside and give up on her love for Masamune when she thinks he's dating Yoshino (which was a misunderstanding). In the sequel, she trusts Masamune won't cheat on her, but she still comes back from Hokkaido to get revenge on Iroha for trying to steal her boyfriend. Once Masamune solves the matter with Iroha, Aki calms down and makes up with Masamune, accepting his marriage proposal.
- Cower Power: She does this to Makabe during their first date after an otaku attempts to take a picture of her in cosplay.
- Defrosting Ice Queen: While she remains fairly haughty, she does soften towards Masamune over time.
- Deuteragonist: She's the female protagonist and Masamune's goal is making her fall in love with him. Naturally, she's just as important and focal as Masamune.
- Does Not Like Men: In school, she has a notorious reputation for rejecting her many suitors in the most humiliating ways.
- Don't Call Me "Sir": When she encourages Yoshino to be honest about her feelings for Masamune, she asks Yoshino to stop referring to her with the "-sama" honorific. It shows that she's formally inviting Yoshino to be her friend instead of just her servant.
- Dramatically Missing the Point: When she keeps insisting Masamune needs to eat more and get fat again, Masamune brings her to his bedroom to show her his personal gym. Masamune is trying to make her understand how hard he trains every day to stay fit, but instead, Aki focuses her attention on the photo that Masamune kept of them together as children. This only feeds into Masamune's insecurities about Aki only loving him for the fat boy he used to be.
- Dude Magnet: Implied to be this as despite constantly mocking the guys that confess to her, more keep coming every week.
- Eating Lunch Alone: She eats lunch all by herself at the P.E. storage. Unusually, Aki is actually very popular at her school. She eats alone because she doesn't want anyone to know she's a Big Eater.
- Establishing Character Moment: When Masamune sees her again for the first time in eight years, Aki rejects a guy who wrote her a love letter and publicly humiliates him in class by calling him "Pudding Prince". This leaves Masamune no doubts that this is the cruel girl who rejected him in a similar way in the past.
- Expository Hairstyle Change: Aki cuts her long hair at the end of the first series. Her new shorter hairstyle gives her a more approachable and mature look that's a better fit for her post-Character Development personality.
- The First Cut Is the Deepest: She keeps rejecting the men who confess to her because she believes Masamune ditched her without explanation and she's deeply afraid she'll be dumped again. After she finds out it was all a misunderstanding caused by Yoshino, Aki starts dating Masamune.
- First Girl Wins: Aki is the first girl to meet Masamune, both in the past and the present. At the end, Masamune chooses Aki as his girlfriend and he eventually proposes marriage to her.
- Freudian Excuse: It's eventually revealed that Aki was actually in love with Masamune when they were kids and the one who rejected him was actually Yoshino in disguise. When Masamune moved away to get in shape and plot his revenge, Aki was left heartbroken, thinking that he had abandoned her, and thus she began humiliating any guy who asked her out.
- Girlish Pigtails: She wears her hair in two long twintails. It makes all the more obvious that she's a Tsundere.
- Growling Gut: Her stomach makes growling noises when she's getting hungry. She eats as much as she can in private because she would be embarrassed if people hear the growls in public.
- Humanizing Tears: Early on, her crying scenes serve to show Masamune and the audience that she isn't completely heartless. As the series goes on, she cries in emotional scenes involving Masamune as she starts softening and being more honest about her feelings.
- Important Haircut: In the final chapter, she cuts her hair short to symbolize her futile efforts to give up on Masamune.
- In-Series Nickname: Other students call Aki the "Cruel Princess" because of how harshly she treats men.
- Innocently Insensitive:
- When they were kids, Aki thoughtlessly told Yoshino that she wouldn't feel lonely as long as she had Masamune. This made Yoshino feel that she didn't mean anything for Aki even though they have been together since they were babies. Yoshino then drove Masamune away so Aki would rely on her again.
- When dating Masamune, Aki honestly doesn't seem to realize she's putting pressure on Masamume by pushing him into eating more food. Masamune has to call Aki out on it and show her his personal gym to get her to understand he doesn't want to get fat again after he spent years working hard to slim down.
- Insecure Love Interest: Similar to Masamune, Aki feels very insecure about their relationship when they start dating as Masamune appears to get physically ill from merely touching her. It gets worse when she finds the notes of his revenge plan against her, which leaves Aki convinced that Masamune doesn't like her at all and she ends up agreeing with Neko about her needing to break up with Masamune for the sake of his happiness, even though it breaks her heart. At the end, however, Aki and Masamune become a couple again, now sure that they do love each other for their shared past and present.
- Instant Fan Club: She has a fan club among the female students.
- Ironic Name: Aki's name translates to "Love Princess", even though she hates romance and cruelly rejects all guys who confess to her.
- I Want My Beloved to Be Happy: Ultimately, she tries to give up her love for Masamune because she's convinced by Neko that Masamune is really in love with Yoshino. However, Masamune turns down Yoshino and gets back together with Aki.
- Kindly Vet: Aki eventually decides to become a veterinarian because of her love for animals, especially dogs.
- Leg Focus: Masamume sees Aki's long, nice legs as her most attractive point. Said legs are her focal point in anime promotional art.
- Letting Her Hair Down: After she defrosts a good deal, she sheds the twintails and wears her hair down. It makes her look less uptight and gentler.
- Lonely Rich Kid: She never had anyone to play with at her mansion other than Yoshino who is more of a servant than a friend. Also, her parents got separated and spent their time competing for her attention. She only ever had real fun when she was with Masamune until Yoshino drove him away out of jealousy.
- Long-Distance Relationship: After graduating from high school, Aki moves out of town to go to college in Hokkaido. By the time of the sequel, she's still together with Masamune, but they haven't seen each other in over a year and he hasn't called her lately because he says he's busy with college and work. At the end, Masamune gives her an engagement ring to prove he's truly committed to her.
- Lovable Alpha Bitch: Aki is the prettiest and richest top student, admired by guys and girls at her school, and she's infamously known as the "Cruel Princess" who humiliates the guys who confess to her. However, Masamune slowly discovers Aki isn't as bad as he thought her to be and she becomes a nicer person through Character Development.
- Loving a Shadow: When she starts dating Masamune, she expects him to act like he did when they were kids and insists he should eat more to gain back weight, which frustrates him as he's afraid Aki only likes the past version of him. Ultimately subverted in the final chapter, as Aki comes to realize that she loves every part of Masamune, past and present.
- Never Gets Fat: Aki frequently chows down enormous amounts of food without gaining even an inch of weight.
- The Nicknamer: She is this to people that she humiliates, giving them derogatory or demeaning nicknames.
- Ojou: She's the daughter of a wealthy family and has her own personal maid.
- Post-Stress Overeating:
- She picked up her Big Eater habits around the time her parents got divorced and Masamune left immediately after.
- In the sequel, she finds out Masamune let Iroha spend the night at his apartment. Even though nothing happened between them, Aki gets so stressed that she binge eats tons of food, including sushi, curry, an entire hotpot, and many ramen bowls.
- The Prankster: When she was a child, Aki played pranks on the servants of her mansion whenever she got bored.
- Private Tutor: She has to tutor Yoshino before the school tests so the latter doesn't end up in extra classes.
- Proper Tights with a Skirt: She wears black pantyhose as part of her school uniform. This highlights her status as an Ojou.
- Rich Bitch: She comes from a wealthy family and is exceptionally haughty.
- Rich in Dollars, Poor in Sense: She thinks going on a date while wearing a Magical Girl cosplay and renting an entire movie theater is normal.
- Sacred First Kiss: She was pretty pissed after Masamune took her first kiss as part of a School Play.
- Single-Target Sexuality: Since she was a child, Masamune has been the only target of her romantic affection.
- Single Woman Seeks Good Man: When she was a child, she developed a crush on Masamune because he was her Only Friend and he cheered her up when she was sad about her parents' crumbling marriage. In the present, unaware of his true identity, she gradually becomes attracted to Masamune's honest and caring side that often slips through the wooer persona he puts up around her. After they officially become a couple, Aki appreciates Masamune is a kind and supportive boyfriend to her, even when they're forced into a Long-Distance Relationship because of her career choice.
- Sour Outside, Sad Inside: Though she is cruel, she acts the way she does in order to keep others at a distance and protect herself from being hurt. Aki's true personality is a crybaby who keeps up a tough front to prevent people from taking advantage of her as well a coping mechanism to deal with her belief that Masamune abandoned her as a kid.
- Super Drowning Skills: She is incapable of swimming.
- Super Gullible: Yoshino manages to get Aki to go on a date in cosplay by telling her it's an appropriate attire for a date. It's somewhat justified since Aki would never believe that Yoshino would lie to her because of their master-servant relationship, but still shows that Aki can be very ignorant and naive because of her sheltered upbringing.
- Sweet on Polly Oliver: Because of an agreement between their families, she gets engaged to Kanetsugu, who claims to be Masamune. The farce is exposed with the reveal that Kanetsugu is a woman. The real Masamune even comments on how absurd it is that Aki didn't notice she was dating another woman.
- Took a Level in Kindness: After she learns who is the real Masamune, she turns much less cruel and starts treating others more kindly, especially when concerning Masamune. After the end of the series, Aki grows into a very nice person, and only reverts to her "Cruel Princess" persona to scare away those who try to get between her and Masamune.
- Tsundere: Harsh type. She's arrogant, condescending, and mean, especially to men. It takes Masamune effort, but he manages to bring out her softer side. In the later parts of the series, her tsun gets very toned down and her dere becomes more prominent.
- Tsurime Eyes: She has the eye shape expected of a mean Tsundere like her.
- Uptown Girl: She comes from a family of much higher social class than Masamune's, although his family is fairly well-off.
- Used to Be a Sweet Kid: As a child, she was way nicer, if mischievous. After her parents got a divorce and her crush apparently abandoned her at such difficult time, she started taking out her anger on the boys who confessed to her.
- We Used to Be Friends: In her childhood, she made friends with Masamune and defended him from his bullies. They were driven apart because Aki called Masamune "Pig's Foot". Actually, Yoshino drove Masamune away and Aki thought he abandoned her.
- Woman Scorned: In the sequel, Aki gets beyond pissed when she finds out Masamune let Iroha stay at his apartment for a night (because she was ill) and goes back to her "Cruel Princess" mode to give Iroha payback for trying to seduce her boyfriend. She almost spills a bucket of cow excrement on Iroha and throws a shovel at Masamune when he tries to stop her.
Yoshino Koiwai
Aki's personal servant, part of a family that has served the Adagaki family line for years. She secretly agrees to help Makabe with his revenge plan.
- Absurd Phobia: She has a fear of fireworks to the point it causes a Heroic BSoD upon even hearing one. It's the result of a childhood trauma caused by one of Aki's ridiculous games.
- Abusive Parents: It's hinted that her parents aren't exactly considerate of Yoshino's emotional well-being, considering that when Yoshino came to her mother crying over Aki damaging her doll her mother coldly told her to get over it.
- The Atoner: She was the one who called Masamune "Pig's Foot" while disguised as Aki out of jealousy over their friendship. After Masamune's "abandonment" broke Aki, Yoshino deeply regrets breaking them apart and tries to pair them together to restore their relationship.
- Bitch in Sheep's Clothing: The first impression Masamune gets from her is that of a Shrinking Violet who is a victim of Aki's cruel attitude, even comparing her to Cinderella. He soon finds out that beneath that shy demeanor, Yoshino can be a nasty Manipulative Bitch. It is comparatively downplayed, as she still is ultimately not a bad person despite her knack for scheming and is trying to make up for destroying Masamune and Aki's friendship out of jealousy when they were all kids.
- Book Dumb: Despite being one of the smartest characters in the series, Yoshino has been seen requiring outside assistance in order to pass her exams.
- Brutal Honesty: She has a habit of telling Masamune off for acting like an idiot in a ridiculously blunt fashion.
- Casual Kink: She has a relationship with Masamune in which he calls her Master, while she calls him Pig's Foot. Were it not for the fact that Pig's Foot was an insult from Masamune's past and Master being his nickname for Yoshino because he's learning from her, one could construe that they are in an S&M relationship.
- Childhood Friends: Played With. Yoshino and Aki grew up together in the mansion, but Yoshino is still Aki's servant and was constantly reminded to act as such. Although Yoshino got tired of satisfying Aki's every whim, she realized Aki is the closest thing she has to a friend since they spent all their time together. By the end of the series, it looks like they might build a friendlier relationship with Aki being much nicer to Yoshino.
- Crazy-Prepared: Has everything from rope traps, knives, chainsaws, brass knuckles, to air guns at her disposal.
- Cute Clumsy Girl: She has a tendency to fall over herself.
- Deadpan Snarker: Like Masamune, she has a tendency to make snarky remarks about the people around her.
- Didn't See That Coming: Despite all of her Manipulative Bitch tendencies, Yoshino was caught off guard by Gasou figuring out her relationship with Masamune and being almost neutralized as a threat.
- Disapproving Look: She tends to flash these at Masamune when he's doing something stupid or gets in to trouble.
- Empty Eyes: Sports these when she's getting serious about anything, usually when plotting or dealing with someone else's plan.
- Fairy Tale Motifs: Masamume frequently compares her to Cinderella.
- Forceful Kiss: In the penultimate chapter, she arrives at Masamune's grandfather's house and kisses Masamune. The next chapter reveals he rejected her after that.
- Green-Eyed Epiphany: She first became aware of her feelings for Masamune when she saw him kissing Aki in the Snow White School Play. Yoshino tried to ignore how she felt so she wouldn't get in the way of Masamune and Aki, but eventually Neko calls her out on it and Aki herself encourages Yoshino to confess her feelings.
- Grew a Spine: In the series conclusion, Yoshino is able to be much more honest with Aki, even criticizing her and openly giving her tough love as seen in anime OVA.
- Hilariously Abusive Childhood: She had to put up with Aki's whims while both were growing up. One time, Aki tied up Yoshino to a firework to try sending her to the moon, resulting in Yoshino developing a phobia of fireworks.
- Hockey Mask and Chainsaw: She dresses up like this for the Kimodameshi during the Island arc. Her plan was to mess with Aki, but her victim ended up being Aki's supervisor/secretary.
- Important Hair Accessory: Her hair clips change position from being on separate sides of her head to being right next to each other when she's plotting a new scheme.
- In-Series Nickname: She's called "Master" by Makabe while they were collaborating on the revenge plot, but still refers to her as such when it's over. Also referred to as a black hearted Cinderella.
- Innocent Beta Bitch: Yoshino is Aki's personal servant so she's obliged to follow her around the school, including when Aki is humiliating her male suitors. Aki also constantly bosses her around and forces her to buy large amounts of food in her place because Aki doesn't want others to know she's a Big Eater. Masamune compares Yoshino to a sweet and innocent Cinderella who must obey her wicked stepmother. While she does have a sly side, she's a very helpful friend to Masamune.
- Insult of Endearment: She calls Masamune by his old nickname "Pig's Foot" and she gave him the nickname in the first place. At first, she wants to remind him of his embarrassing past as a fat kid, but both quickly start taking it as a friendly nickname as they start getting along.
- Irony: Yoshino, while posing as Aki, tells Masamune that there was no way she would've fallen for him. 8 years later, Yoshino does fall for him while helping him get the heart of the girl he wanted to dump.
- I Want My Beloved to Be Happy: She loved Masamune way back since the Yasaka Festival, but she was holding back for Aki's sake. In the finale, she does confess to Masamune only to be rejected by him. She then gives him and Aki her blessing.
- Legacy of Service: Her family has served under the Adagakis for generations.
- Love Hurts: Despite loving Masamune, she herself admits that her feelings are irrelevant despite being notably hurt by her belief that Masamune can't be with her.
- Manipulative Bitch: Yoshino is the most manipulative character in the cast, constantly one upping everyone else's plans either by using her cutsy persona to get people where she needs them to be or her more dangerous side to intimidate other people.
- Matchmaker Crush: She's in on Masamune's plan to make Aki fall for him, but somewhere along the way, she falls in love with him herself.
- Meido: She serves as Aki's personal maid.
- My God, What Have I Done?: She didn't realize the severity of what she did by driving Masamune away until she saw how badly it affected Aki.
- New Friend Envy: Although she has to act as Aki's servant rather than a friend, Yoshino has been by Aki's side their entire lives. When Aki became close friends with Masamune, Yoshino felt like Aki was pushing her aside and thought Aki maybe didn't really appreciate her company in the first place. In a fit of jealousy, Yoshino disguised herself as Aki and called Masamune "Pig's Foot" to drive him away, all in order to force Aki to rely on her alone. She soon regretted doing this when she saw Aki so torn up about Masamune disappearing.
- Obfuscating Stupidity: Pretends to be dim, while in all actuality is the most competent character in the show to get what she wants. It works to her advantage as it allows her to go without notice.
- Relationship Sabotage: When she was a child, she hated how Aki only seemed to care about Masamune. In a fit of jealousy, Yoshino disguised herself as Aki and from a window, she told Masamune that she would never come to like a "Pig's Foot". Yoshino almost immediately regretted what she did when she saw Aki crying every day because of Masamune's apparent abandonment, but it was too late to undo her wrongdoing because Masamune had left the town to live with his grandfather. Once she recognizes Masamune in the present, she pretends to help him in his revenge plot to hopefully fix the relationship between him and Aki which she ruined.
- The Reliable One: For both Aki and Masamune as both of them depend on Yoshino to get the ball rolling for their plots. Masamune even lampshades it by calling her the only one he can ever count on.
- The Reveal: She tells Makabe herself that she was the one who originally called him "Pig's Foot".
- Romantic Runner-Up: Over the course of the series, Yoshino develops feelings for Masamune, but doesn't act on it because she doesn't want to ruin the chances of Masamune and Aki getting together again. Throughout the closing chapters, Neko and Aki push Yoshino to be honest about her crush and confess to Masamune because both believe she's the one who should be with Masamune. Yoshino does kiss Masamune in the penultimate chapter, only for Masamune to turn her down because he wants Aki to be his girlfriend again.
- Romantic Wingman: She's Masamune's reliable accomplice in his plan to make Aki fall in love with him.
- Rōnin: In the sequel, Yoshino failed her college entrance exam and got into the same college as Masamune a year later.
- Secret-Keeper:
- She immediately figures out who Masamune is, but doesn't tell anyone including Aki about his past as a bullied fat kid and tries to help him hook up with Aki despite knowing of his intentions to reject her.
- She's the only person outside Masamune who knows Aki is a Big Eater.
- Servile Snarker: Despite being Aki's maid, Yoshino casually make fun of her master for making stupid mistakes.
- She Cleans Up Nicely: In the OVA, Yoshino's sister dress her up for her day off, making her look stunning. Yoshino, however, doesn't feel comfortable with her new look and changes to much plainer cloths once she gets the chance.
- Spotlight-Stealing Squad: After she confesses she was the one who gave Masamune the nickname "Pig's Foot", an inordinate amount of panel time is dedicated to Yoshino and her feelings for Masamune. Throughout the closing chapters, it really seems Yoshino might have as well replaced Aki as the main heroine. She's taken out of the spotlight until the very last chapter because Masamune rejected her. Even then, the epilogue OVA is more about Yoshino than either Masamune or Aki.
- Stealth Hi/Bye: Pulls this on multiple characters when she's setting up one of her plans.
- The Stoic: She barely ever changes her facial expression in response to the events around her.
- Strong Family Resemblance: She looks a lot like her mother.
- Sugar-and-Ice Personality: She acts like a cold-hearted, calculating Emotionless Girl. It's until much later that the reveal of her role in splitting Masamune and Aki apart and her conflicting feelings for Masamune reveal a surprisingly sensitive side to her.
- Tareme Eyes: Her droopy eyes complement her harmless, shy appearance. But don't let her fool you.
- Third-Option Love Interest: She develops feelings for Masamune midway through the story, becoming his third potential love interest. She also displays qualities of both Betty and Veronica, being both a Cute Clumsy Girl willing to help out Masamune and a sly Manipulative Bitch.
- Troll: Even though she takes some abuse from Aki, she does get back at her in various ways without her knowing; for example, tricking her into wearing Pretty Cure cosplay on a date as well as the time she told Aki to preform an embarrassing chant to "complete" donuts as revenge for waking her up so late in the night.
- Unwitting Instigator of Doom: While she genuinely resented Masamune and Aki's relationship, ruining the former's childhood was completely unintentional, and she has since deeply regretted it.
- Weight Woe: In After School, Yoshino gains weight because Aki isn't overworking her anymore. She then asks Aki to boss her around again to get some exercise.
- When She Smiles: In the OVA that takes place after the manga finale, Yoshino is now able to smile happily. She surprises her own sister with it.
Tae Futaba
Student head of Class 2-B, where Masamune and Kojuurou also study.
- Class Representative: Of Masamune and Kojuurou's homeroom.
- Curtains Match the Window: She has brown hair and brown eyes.
- Demoted to Extra: Eventually falls by the wayside.
- Hopeless Suitor: At one point she tries to court Masamune. The latter declines, clearly refusing to be distracted from his plans for grand revenge.
- Love Confessor: She admits to Yoshino that she has a little crush on Masamune (not that Yoshino didn't know already), but decides against confessing to Masamune himself because she knows he's only interested in Aki.
- Love Informant: She tells Neko about Kojuuro's crush on her. While Neko is surprised, she immediately brushes off the idea of dating him.
- Yaoi Fangirl: She imagines one erotic scenario between Masamune and Kojuurou.
Neko Fujinomiya
Another transfer student who seems to be interested in Masamune.
- Accent Slip-Up: She's from Kyoto, but is careful to speak in proper keigo. She can slip into a Kansai accent when thinking about Masamune by herself.
- Because You Were Nice to Me: Her story of why she fell in love with Masamune. She claims that he gave her his jacket when she was shivering in the cold while collecting donations. However, Masamune was still fat and living with his grandfather at the time. She refuses to tell Masamune why she lied or the real reason she likes him, claiming that it would be too embarrassing.
- Betty and Veronica: The Betty to Aki's Veronica. While Neko isn't so ordinary since she's also rich and somewhat strange, she has a much nicer personality than Aki and is open about her love for Masamune. Yet, Masamune always chooses Aki over Neko.
- Childhood Friend Romance: It's revealed she met Masamune once when they were kids at a party. The fact that he was pudgy kid like her is what sparkled her interest in him.
- Commonality Connection: When Masamune asks why she chose to fall in love with him, Neko says it was out of a whim. Actually, she had gotten interested in him because they have a significant thing in common; they were both fat in their childhood.
- Delicate and Sickly: She's very sick and needs an operation which has a 30% chance of killing her. The operation is a success and she becomes healthier thanks to it.
- Feigning Healthiness: She makes others think she's a health enthusiast who loves healthy foods and that's why she takes large amounts of supplements before meals. The truth is those pills are her medication as she has a very frail health, but doesn't want to concern her classmates. At one point, she goes as far as to pretend her Blood from the Mouth is ketchup.
- Forgotten First Meeting: Unlike with Aki and Yoshino, Masamune can't recall anything about Neko even though she claims to have met him elsewhere before. Turns out they briefly met once at a party when they were kids, but he doesn't recognize her because she was fat back then, just like him.
- Formal Characters Use Keigo: She's the daughter of a rich family and always speaks very politely.
- Formerly Fat: Like Masamune, she was chubby when she was a child.
- Friendless Background: In her previous school, she wasn't able to make friends because the other students were reluctant to hang out with her out of concern for her poor health. Although she's sad about Masamune choosing Aki over her, Neko is happy to have made friends in her new school.
- Going Commando: Masamune and Aki discover that she doesn't wear panties, courtesy of a Marilyn Maneuver.
- I Want My Beloved to Be Happy: Even after getting soundly rejected, Neko wants to see Makabe happy in a relationship he deserves, which leads her to observing his and Aki's new courtship and looking at all the cracks in it for their own good.
- In Love with Love: She confesses to Masamune that she was pursuing him in order to experience romance before a risky operation rather than out of genuine love. Near the end of the series, however, Neko affirms she has come to love him for the person he is.
- Indignant Slap: She slaps Yoshino when the latter accuses her of having demanded Aki to break up with Masamune so she could get a chance to steal him away, since even though she's still heartbroken because Masamune rejected her, she knows he won't ever choose her.
- New Transfer Student: Transfers into Masamune's class after meeting him again the week before.
- Nice Girl: Neko is a sweet, kind, and friendly girl at heart. She's also one of the few characters to befriend Masamune quickly and relate to him relatively easily since she, like Masamune, was used to be fat.
- Oblivious to Love: She has no idea of Kojuuro's crush on her until Futaba told her about it. Neko immediately makes clear she isn't interested, though.
- Ojou: Like Aki, she also comes from a wealthy family.
- Parasol of Prettiness: She sometimes walks around the school campus with a parasol to block off the sun.
- Shipping Torpedo: Thinking that Masamune doesn't truly love Aki, Neko insists they have to break up because Masamume will be miserable if he keeps forcing himself to stay together with Aki. However, Masamune ends up choosing to get back together with Aki, having realized he does love her for real after all.
- Soap Opera Disease: She suffers from an unspecified disease that is so serious that she collapses quite a few times in the series. She does get an operation to get it cured, but is still somewhat recovering.
- Wrong Genre Savvy: When she sees Masamune and Aki having problems after dating, Neko assumes that Masamune isn't actually in love with Aki but with Yoshino and persuades Aki to break up with Masamune because he can't realize his true feelings unless he stops being held back by the past. Turns out Neko's assumptions were completely wrong; Masamune rejects Yoshino's confession and asks Aki to be his girlfriend again, now being sure he does love Aki.
Kojuurou Shuri
Masamune's ridiculously effeminate best friend.
- Because You Were Nice to Me: He develops a crush on Neko because she's the only Nice Girl he knows and the one who never makes fun of his girly looks.
- Book Dumb: He mentions he got single-digit grades in all subjects.
- Bromantic Foil: He's gentle, friendly, not very smart and loves sweets, contrasting the narcissistic, intelligent, but secretly insecure Masamune who tries to avoid calories at all cost.
- Butt-Monkey: He's constantly mocked for looking like a girl and his attempts to impress his crush Neko always fall flat.
- Camp Straight: Despite his effeminate looks and mannerisms, he develops a crush on Neko.
- Cannot Spit It Out: He develops a crush on Neko, but can't work up the nerve to tell her.
- Cross-Cast Role: Futaba casts him as Snow White for the School Play.
- Dude Looks Like a Lady: He looks so girly that Masamune questions if he qualifies as a boy.
- Effeminate Voice: He's a boy with not only a girly face, but also voice done by Saori Hayami.
- Expository Pronoun: He refers to himself with the unassuming "boku". He tries to switch to the much more masculine "ore" when he wants to sound manlier.
- Hopeless Suitor: He develops a crush on Neko, but she doesn't like him as anything more than a friend.
- Keet: He's an extremely cheerful boy.
- Nice Guy: Kojuurou is very friendly and sweet towards everyone, especially Masamune, who sits next to him.
- Sensitive Guy and Manly Man: The Sensitive Guy to Masamune's Manly Man. Kojuurou is a cute, girly-looking boy who loves sweets, while Masamune is a handsome guy who is obsessed with physical fitness.
- Sweet Tooth: In contrast to Masamune, Kojuurou enjoys eating sweets, fitting into his sweet nature of his personality.
- Two First Names: His family name Shuri can be used as a given name for girls. This only adds to his Dude Looks Like a Lady gag.
Aki's "Bodyguards"
Left to right: Sonoka Kaneko, Kikune Kiba, Mari Mizuno
Three girls who follow Aki around the school.
Tropes applying to the three
- Be Careful What You Wish For: They wanted Masamune's singing in karaoke to turn off Aki, too bad they got subjected to it as well.
- Blonde, Brunette, Redhead: Sonoka has dirty-blonde hair, Mari has black hair and Kikune has auburn hair.
- Early-Bird Cameo: The anime has them make brief cameos as part of Aki's group in episode 1, before their proper introduction.
- Enemy Mine: They form an alliance with Gasou because the latter also wants to keep Masamune away from Aki. They only tolerate the fact that Gasou seeks to become engaged to Aki because Gasou has promised their relationship won't be physical.
- Girl Posse: They're Aki's devoted followers.
- Karma Houdini: Despite holding Masamune hostage to sabotage his class play, they face zero consequences for their actions although Kikune gets soaked and Mari gets put through some stress when Gasou vanishes.
- Loving a Shadow: They idolize Aki, viewing her as some sort of man-hater princess. They won't stand that she ever gets along with a man because it would tarnish their "pure" image of her and are willing to do extreme things to keep her away from Masamune so he doesn't "defile" her.
- Moral Myopia: They hold Masamune hostage to sabotage Class 1-B's play, then have the nerve to be indignant when it looks like Gasou was kidnapped for the same thing.
- Right for the Wrong Reasons: While Masamune is out to hurt Aki, their actions are driven more by their dislike of any guy that gets close to Aki than any justifiable suspicion.
- Shipping Torpedo: They dislike Masamune and try to get in his way of getting closer to Aki.
- Town Girls: Sonoka is girly, Kikune is tomboyish, and Mari is neither a tomboy nor a girly girl.
Sonoka Kaneko
A third-year student and vice-president of the student council.
- Bitch in Sheep's Clothing: Sonoka acts sweet and innocent, but is shown to be very manipulative and basically browbeats the student council into favoring the proposal for Aki's play.
- Girlish Pigtails: Her twintail hairstyle complements her girly appearance.
- Older Than She Looks: Sonoka is in her third year of high school, but she looks like a middle school student.
Kikune Kiba
A first-year student and member of the kendo club.
- Boyish Short Hair: She's an athletic tomboy with short hair.
- Dumb Muscle: Kikune is the most physically adept and seems to be rather dim, falling for Masamune's ploy rather easily.
- Jerkass Realization: Kikune has one after Masamune calls her out for her self-righteous Moral Myopia after she was holding him hostage and unties him. Too bad she mistakenly assumes Masamune was on the plan to kidnap Gasou.
- Modesty Shorts: She wears biker shorts under her skirt.
- Tomboyish Voice: She has a somewhat husky voice, fitting her tomboyish character.
Mari Mizuno
A second-year student and Aki's classmate.
- Character Tics: She tends to adjust her glasses constantly.
- Class Representative: She's the representative of Aki's homeroom.
- Does Not Like Men: Mari seems to hold contempt for all men.
- Hypocrite: She berates Sonoka and Kikune for feeling disappointed in Aki for accepting a man (Gasou) into her life... Only to admit she's just as disappointed as them, if not more.
- Stoic Spectacles: The bespectacled Mari is the least emotive of Aki's followers and always speaks in a deadpan tone.
- Ungrateful Bastard: Mari displays zero gratitude for Masamune's going out of his way to fill in as the Prince, despite being ill, and goes on to keep trying to undermine him.
Kanetsugu Gasou
Voiced by: Mitsuki Saiga (Japanese), Ryan Reynolds (English) Foreign VAs
A transfer student claiming to be Masamune and resembles a chubby version of him in order to get into Aki's good graces. Plans on getting engaged to her for certain reasons.
- Accidental Pervert: Kanetsugu unintentionally walked in on the girls' changing room when looking for somewhere to change for the School Play. Ironically, none of the girls knew Kanetsugu is a girl too.
- Bifauxnen: Even before posing as Masamune, Kanetsugu went to parties wearing a suit and she looked pretty good in it.
- Big Beautiful Woman: Her features are chubby and plump, but she's still quite cute.
- Big Sister Instinct: The purpose of her trying to marry Aki was to help her sick sister.
- Boyish Short Hair: She keeps her hair short, which is one of the things that make it easy for her to pass off as a guy.
- Con Man: She pretends to be Aki's childhood friend Masamune to make her willing to agree to the Arranged Marriage that their grandparents set up between their families, because she needs Aki's family fortune to save her own family from poverty.
- Cross-Cast Role: Kanetsugu is casted as the prince for the Snow White School Play, but nobody knows that she's really a woman at the time.
- Disposable Fiancé: Kanetsugu only approaches Aki for her money, using an old agreement between their families and pretending to be Aki's childhood friend Masamune to marry into the Adagaki family. Kanetsugu's plans are ruined when Masamune exposes Kanetsugu as a woman disguised as a man.
- Formerly Fat: By After School, she appears to have gotten slim.
- Gender-Blender Name: Kanetsugu is historically a Japanese male name. After the Gender Reveal, it's weird to find that's her actual name.
- Gender-Concealing Voice: Kanetsugu has a remarkably deep voice, which is useful when she has to disguise herself as a man.
- Girliness Upgrade: After the Gender Reveal, she starts dressing more femininely and wears hair accessories.
- Gold Digger: Kanetsugu plans to marry into the Adagaki family for their money. She's still more sympathetic than most examples because she's desperate to save her family from ruin and get medical treatment for her younger sister.
- Graceful Loser: After Masamune exposes her con to Aki by (accidentally) revealing her to be a woman, Kanetsugu isn't angry to see her plans have been completely ruined, and even laughs it off because she's relieved she doesn't have to keep lying about her identity anymore.
- Healthcare Motivation: Kanetsugu poses as Aki's childhood crush and manipulates her into accepting the engagement their families arranged between them, in order to pay for her sister's medical expenses.
- Hidden Buxom: She wears breast bindings as part of her male disguise.
- Identical Stranger: Looks like a grown up version of the fat Masamune.
- Important Hair Accessory: She starts wearing a cat hairpin after her lie is exposed by Masamune and she stops disguising herself as a guy.
- Impoverished Patrician: The Gasou family lost all their money long ago. Kanetsugu is trying to marry Aki to restore the family fortune.
- New Transfer Student: She transfers into Aki's class to get closer to her.
- Pragmatic Pansexuality: Kanetsugu is actually a woman and hasn't shown real signs of attraction to other women, but she disguises herself as a man so that Aki thinks she's Masamune, the fat boy she liked as a kid, and tries to become engaged to her because she desperately needs the money of the Adagaki family to save her own family from poverty.
- Raised as the Opposite Gender: She was raised as a man because she's the firstborn heir of the Gasou family and they have to keep up appearances even though they're broke.
- Romantic False Lead: Kanetsugu shows up as Masamune's romantic rival and first real threat to his plan of making Aki fall for him. Although, Kanetsugu has no real interest in Aki herself and is only after her family's money. Ironically, Kanetsugu is managing to win over Aki by pretending to be her childhood friend Masamune because the real one is still keeping his identity secret from her.
- Sweet Polly Oliver: She is actually a woman in disguise and was only trying to get engaged to a rich girl in a desperate attempt to get the money to treat her sick sister.
- Unsettling Gender-Reveal: Masamune and Aki are left in shock when they realize Kanetsugu has breasts.
- Why Did It Have to Be Snakes?: Like Masamune, Kanetsugu completely freaks out at the sight of insects.
Kinue Hayase
Masamune's absurdly young-looking mother. She cooks lots of fried food and desserts for her children, which was the cause of Masamune's childhood obesity.
- Amazingly Embarrassing Parents: She's ridiculously childlike in appearance and mannerisms for a 42-year-old, and has a habit of adding too much sugar and/or fats into her dishes, which Masamune refuses to eat since it's the reason he was fat as a kid. Masamune flat-out feels this way about her after she drags Yoshino and Neko to her home and has them help her prepare dinner.
- Ambiguous Situation: In one episode, her normal-looking sister comes over with her daughter Haruka, who is the spitting image of her mother and aunt, then after seeing Kinue and Haruka in onesies says she's joining in, goes to change. Both into said onesie and into the child-like appearance of her daughter and sister. Thus both Masamune and Chinatsu can only wonder if their mother's extremely youthful appearance is the result of Voluntary Shapeshifting.
- Doting Parent: She likes doting on her children by making them delicious treats, but Masamune can't appreciate it because his mother's love for high-calorie food is the reason behind his childhood obesity. After Masamune gets into college, Kinue starts smothering him with affection more than ever, such as wanting to enroll at his college and cuddle in bed with him, so much so that Masamune couldn't handle it and moved out.
- Housewife: She spends the day at home, cleaning and cooking (unhealthy) food for her children.
- Idiot Hair: She has a cowlick on top of her hair, marking her as a childish character.
- Mum Looks Like a Sister: She's Masamune's mother, but people inevitably mistake her for his little sister since she looks even younger than his actual little sister.
- Older Than She Looks: She looks like a child, but is actually 42 years old.
- Prone to Tears: She easily tears up whenever Masamune refuses to eat her high-calorie meals.
- Signature Headgear: Her hair is adorned with heart hair clips, just to make her look even cuter.
- Sweet Baker: She loves baking donuts. She feels sad that Masamune refuses to eat her desserts to keep his new figure.
- Wacky Parent, Serious Child: Kinue is ridiculously childlike in appearance and mannerisms for a 42-year-old, and has a habit of adding too much sugar and/or fats into her dishes (which her son Masamune blames for his past obesity).
- Womanchild: Not only does she look like an elementary school student, she behaves like one for the most part.
Chinatsu Hayase
Masamune's younger sister.
- Annoying Younger Sibling: She enters her older brother's bedroom without knocking and makes fun of him for checking out his muscles in the mirror.
- Big Eater: She's constantly snacking on high-calorie foods.
- Cuteness Proximity: Seeing her mother and younger cousin in piglet onesies causes her to start an impromptu photo session.
- Never Gets Fat: Chinatsu only eats junk food, but unlike her brother, she has never gotten fat in her whole life.
- No Hero to His Valet: She doesn't get how her brother has become a Chick Magnet after slimming down. To her, her brother is the same uncool guy he has always been.
Midori Yuisaki
The secretary for the Adagaki household.
- Beneath the Mask: Midori puts on a proper and kind facade during her job, but underneath she's hot-tempered and rather rude.
- Defrosting Ice Queen: While intially hostile to Masamune for dating Aki, Midori warms up to him after he carries her home and confesses he's lied about dating Aki.
- Gone Horribly Wrong: Her scheme to scare Masamune in the abandoned mansion backfires horribly, she winds up terrified of a masked Yoshino and knocks herself out.
- Shipping Torpedo: She really hates thinking that Masamune is dating Aki and tries to make him look bad in front of Aki to break them up.
- Unwitting Instigator of Doom: Midori mistook Kanetsugu Gasou for Aki's former childhood playmate at a party, giving them the idea to manipulate Aki with that story.
Sumire Gasou
Voiced by: Maria Naganawa (Japanese)
Kanetsugu's younger sister.
- Affectionate Nickname: She calls Kanetsugu "Kane-chama".
- The Cutie: She's a very sweet and adorable little girl.
- Delicate and Sickly: She has very frail health and has been hospitalized many times, making it difficult for the impoverished Gasou family to pay for her treatment.
- It Was a Gift: After getting money from Aki, Kanetsugu gets Sumire her first real cellphone as a present.
- Morality Pet: Kanetsugu is basically a Con Man trying to mooch off of Aki's money, but her interactions with Sumire show she isn't that bad of a person; she's just desperate to save her family from poverty.
- Satellite Family Member: Her only role is being Kanetsugu's cute little sister and all her appearances have her interact only with Kanetsugu.
- Tareme Eyes: Her big and round eyes reflect her sweet character.
- Tomboy and Girly Girl: The Girly Girl to Kanetsugu's Tomboy. Sumire is very girly, in contrast to her older sister who disguises herself as a man.
Muriel Besson
Voiced by: Miku Itō (Japanese), Reshel Mae (English) Foreign VAs
A French girl who wants to make her own romantic comedy manga. She meets Masamune and Aki during their school trip to Paris and asks them to be the models for her manga.
- Accent Adaptation: In the English dub, Muriel speaks with a French accent.
- Adaptation Dye-Job: In the manga, the ribbon of Muriel's beret has the three colors of the French flag; blue, white and red. In the anime, it's plain pink.
- Artsy Beret: She's an aspiring manga artist and wears a beret.
- Funny Foreigner: Much of her humor is about how all her knowledge of Japanese culture comes from anime and manga, as well as her lack of understanding of how much more reserved the Japanese are about displays of romantic love.
- Gorgeous Gaijin: She's an attractive, buxom French girl in a Japanese series.
- Mafia Princess: Her older brother is a mafia boss who loves to spoil her. Muriel doesn't seem aware of his job, though.
- Occidental Otaku: She's a big fan of anime and manga because her brother brings her manga when he goes to Japan for work.
- Phenotype Stereotype: To identify her as a French girl in a Japanese series, Muriel is blonde, blue-eyed and taller than the Japanese girls in the cast.
- Sequential Artist: She's an aspiring manga artist with dreams of making a romantic comedy.
- Statuesque Stunner: Masamune considers her tallness to be her most attractive trait.
- Useless Accessory: She wears an eyepatch even though her eye works perfectly.
- Verbal Tic: She tends to add "gozaru" at the end of her sentences.
- Write Who You Know: In-Universe. She ends up drawing a manga about Masamune and Aki after getting inspired by the story of their childhood fall out.
Franck Besson
Voiced by: Yasuyuki Kase (Japanese), Derick Snow (English)
Muriel's older brother.
- Accent Adaptation: Like Muriel, the English dub has Franck speak with a French accent.
- Big Brother Instinct: He loves his younger sister more than anything in the world, and often spoils her by bringing her manga and doujinshi that she asks him for during his business trips to Japan.
- The Don: He's the boss of an underground organization.
- Knight Templar Big Brother: He'll do anything to keep his sister happy. He even sends mobsters to threaten Masamune and Aki into helping Muriel with her manga.
- Knowledge Broker: In the sequel, Franck uses his underground connections to help Masamune find information about Iroha's missing fiancé Shinobu.
- Rugged Scar: He has a scar on his left cheek that looks like it was cut with a knife.
- Satellite Family Member: His only appearances in the series are about him supporting his sister Muriel's manga work.
Iroha Kyogoku
- Affectionate Nickname: She calls Masamune "Darling".
- Attempted Homewrecker: She tries to make Masamune her husband and stalks him around their college, all while completely ignoring that Masamune is together with Aki, albeit in a Long-Distance Relationship. With Franck's help, Masamune finds Iroha's old fiancé Shinobu, who she still loves. At the end, Iroha marries Shinobu while Masamune proposes marriage to Aki, who accepts.
- Cartwright Curse: She has been engaged three times, all of which ended very badly. Her first fiancé died from illness, the second one died in a plane crash, and the third one got scared of her family's curse and eloped with his maid. Although, turns out her second fiancé is still alive and waiting to elope together with her.
- Childhood Friend Romance: Her second fiancé Shinobu was her childhood friend. She sent him to another country and tried to marry Masamune because she feared her family curse would kill Shinobu, but Masamune reveals Shinobu still loves her. Iroha then goes to reunite with Shinobu and marries him.
- Entitled to Have You: Because of her family's so-called curse, she needs to marry a man with a lot of good luck. After being convinced that Masamune is lucky, Iroha decides to make him marry her with no regard for his feelings.
- Forceful Kiss: She forces a kiss on Masamune right after meeting him and deciding to make him her husband.
- I Want My Beloved to Be Happy: Because of her family being known to be cursed, she thinks any man she marries will die young. To protect Shinobu from the curse, she faked his death, sent him to another country, and tried to marry Masamune instead. Masamune discovers her true motives and convinces Iroha to reunite with Shinobu.
- Non-Idle Rich: She's a privileged rich girl who doesn't need to work to earn a living. Although, she's willing to get several part-time jobs to impress Masamune.
- Ojou: Her family is very influential in the world of politics and business.
- Perfectly Arranged Marriage: After her first fiancé died from illness, her family planned for her to marry his brother Shinobu instead. Iroha was in love with Shinobu, but he presumably died in a plane crash. Turns out she sent him to another country because she was afraid he would die as a result of her family curse. Thanks to Masamune, Iroha finds out Shinobu still loves her and she leaves Japan so she can marry him.
- Rejection Affection: Masamune rejects her right away and tells her he already has a girlfriend, but Iroha refuses to back down and still wants him as her husband.
- Romantic False Lead: She gets introduced in the sequel with the sole purpose of shaking things up and bring more tension to Masamune and Aki's already shaky relationship.
- Spoiled Brat: She acts like a selfish and entitled brat who thinks she can claim Masamune as her boyfriend, despite him telling her he already has a girlfriend, just because her family is wealthy.
- Stalker with a Crush: She keeps following Masamune everywhere he goes and doesn't plan to stop until he agrees to be her boyfriend. She even sends her bodyguards to spy on him in the toilet.
