A bitter love story depicting the realities of love between a female college students who earn money as a stand-in girlfriend, and men attracted to them. Each of them has a complex and worries, and while struggling, what is ahead of them trying to overcome them?
With graduation 10 days away, homeroom teacher Hiiragi gathered all 29 students of class 3-A and proclaims them his hostages. His last lesson regards the death of a student that passed away a few months before. Nobody will be able to graduate until the truth is known.