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Synopsis

Kirino Kousaka appears to be the flawless pupil: attractive, high-achieving, and employed as a model with her close friend Ayase Aragaki, who detests untruths and otaku culture. Behind this polished exterior, Kirino conceals a significant private obsession. One day at home, her ordinary brother Kyousuke finds an explicit game that reveals Kirino’s hidden hobby. To prevent scandal, she insists he keep silent and then exposes him to eroge and anime. Through Kirino’s guidance, Kyousuke meets Ruri Gokou, a gothic-lolita figure, and Saori Makishima, an intellectual otaku, which pulls him into a new subcultural world. As Kyousuke grows more entangled in his sister’s double life, maintaining secrecy becomes increasingly difficult, testing their trust and the boundaries between them.