Hashiba Sora

Sora is a student at an all-boys' high school, and a member of the school "Nandemoya" (Jack-of-All-Trades) team. He has lots of friends among the student body, but is also a target for rumors, especially after his mysterious fall though the upper-floor window of one of the school buildings, which left him hospitalized. He has no memories of his childhood, including his new roommate, Sunao, who he is told is his childhood friend. He decides he is going to find out why he mysteriously fell and has lost memories.