Shiraishi Aoi♀

Aoi is the little sister of Tsubame and the cousin of Shuuji who's living together with them. She is a second year student and is the classmate of Shuuji, Kouichi, Itsuki and Shinobu. She is also a childhood friend of Amane. Seeing that her cousin was in a problematic situation, she has consulted with Tsubame and picked Shuuji up to live with them. She is very close to Konomi and her policy is "there's no need to work hard".

Aoi is a girl who has a double life, she is very lonely and reserved for school, dressing so as not to show off, wearing glasses, tying her hair, with the label of the serious and boring student, which means that she has no friends at school, even coldly avoiding her cousin when they meet in class. Outside, Aoi is another girl: she is a stylish and a famous model knowed as Shirai Sumire (白井 スミレ) with a shoulder-length bob and is very sexy. At home, Aoi is much more relaxed. Wearing revealing clothes as pajamas and playing retro games in the living room (his favorite game is Pokevy, a very long game that has no backup function). When Aoi learns that Shuuji is in a relationship with Itsuki, she picks him up in the living room and orders him to explain.

The relationship that Aoi and Shuuji maintain is similar to a relationship between siblings. They heckle, make derogatory remarks and tease each other all the time. However, Aoi loves Shuuji very much, like her brother, and this love is reciprocal. She is ready to do anything for him if he has problems. She has no embarrassment with Shuuji because she doesn't see him at all as a potential lover of the opposite sex, even asking him how he does to "endure" his impulses since he lives alone with two pretty girls. She even thinks that Shuuji fantasizes about Tsubame because he always looks "discreetly" the breasts, buttocks and thighs of her sister.

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