Kanojo no Kanojo to Fujun na Hatsukoi

A student agrees to let Tsukasa, an academically gifted and attractive classmate, live with him to help raise his grades, as failing again would cost him his independence. He discovers Tsukasa kissing another girl, revealing she has a girlfriend. Despite her close and sometimes intrusive behavior, she continues the living arrangement. Her girlfriend disapproves, believing it to be cheating, but Tsukasa remains unconcerned. Over time, the student's grades improve, and he grows more comfortable with the situation. He tells himself that as long as there is no love involved, the arrangement is not cheating, and that avoiding love will allow everyone to remain happy.