High school student Yuta bumps into a man outside the train station, injuring him. The man's name is Tsubaki Nishijima, occupation novelist. In exchange for crippling his arm, Tsubaki demands Yuta work like ...

Akio and Umi live in the same student hostel. While Akio tends to avoid people, Umi is a connoisseur of the one-night stand. Still, with time they begin to seek each other out in order to deal with their pasts.