Shuichi is a 24 year's old man always targeted by several girls at his school (before he graduated) because of his good looks, and how smart he is and his voice, he seems looks calm and like to smile a lot, and also kinda like to tease someone close to him not acquaintance and always helping people and he kinda popular on kyoko and her friends school and he the only one who's not sharing a same as Kyoko,toondori,olivia,akira

He looks perfect but he actually don't.

Akira is 23 year's old man who loves books very much and he pretty smart on school before nothing special about him he actually easier to be annoyed especially if it's kyoko and toondori who annoyed him akira sharing house with Kyoko,toondori,olivia, akira also likes chocolate chip cookies and coffee and dark chocolate a lot always have them everytime he's going to reading books, he doesn't want to involved in dumb things but kyoko and toondori keeps involving him and always mad easily

Introvert more like anti-social or something 

Kyoko is a 21 year's old girl who's very had cheerful attitude and sarcastic her attitude could annoys someone else especially akira, she's also very carefree she likes to do anything she wants she doesn't care about everyone keeps saying anything about her and she always annoys akira with her friend toondori, and she's kinda tomboyish or something and probably kinda pick me one, and she hates unusual texture of foods she never eat kyoko,akira,toondori,olivia living in the sharehouse btw

Cheerful more like annoying basically 

Toondori is a 23 year's old man who kinda annoying attitude, and he kinda stupid sometimes he loves to annoy akira a lot with kyoko he also doesn't care about anything, he always taking someone's food without asking, he always trying to be cool like shuichi to be more popular but sadly he doesn't, he also joined theatre club with shuichi and he has blonde hair and blue eyes akira,kyoko,olivia and toondori sharing a same house of course 

Piece of dumbass 

Olivia is a 22 years old girl (and also has "I know I'm pretty, so?" Energy) and she's also a dumbass too and impulsive, her and toondori are childhood friends she doesn't like waiting (short attention span) and she like a cute things and selfies and great tease of clothes of course the self love personality is basically her masking her insecurity I think? And of course liking attention sharing a same house with akira,toondori,kyoko (best friend on highschool btw)