Teppei Nanase, a student and model, is sure in his straight sexuality and has the dating track record to prove it. When his male classmate, Ryusei Kamiya, starts making very forward advances on him, he does what anyone would: avoids him like the plague. However, one little slip in security and Teppei finds himself alone with Ryusei and his intense advances. Despite this past trauma, Teppei can't stop the curiosity and urge to make Ryusei live up to all his promises, and unlike his academic attendance, Ryusei doesn't only meet, but exceeds expectations.