The story is set in the boys' dormitory of a prestigious co-ed school. Despite being a talented person who is both serious and hardworking, the plain-looking Yano has always been stuck with being second place in the school ranks. His roommate, Odajima, on the other hand, is the top ranker who is not only blessed in both intellect and looks but is also a playboy.

Yano sees Odajima as an otherworldly creature and his natural enemy. While living together with him, Yano never imagined that things would start to develop in a festering way between them.