Kanojo no Kanojo to Fujun na Hatsukoi

“In exchange for my help with your studies, you must let me stay at your house until summer vacation.” Faced with the threat of losing his chance to live independently if he fails again, the protagonist is forced to accept this proposal from Tsukasa, the smartest and most beautiful girl in school. However, his perspective shifts when he witnesses Tsukasa kissing another girl in the park. It turns out that Tsukasa, who frequently invades his personal space, already has a girlfriend. While Tsukasa’s partner objects to the living arrangement, viewing it as a form of cheating despite the same-sex dynamic, Tsukasa dismisses her concerns. As time passes, the protagonist’s grades improve, and he begins to enjoy cohabiting with Tsukasa. He adopts the mindset that “it isn’t cheating if there are no romantic feelings involved,” convincing himself that ignoring matters of the heart will allow them all to coexist happily.