After crushing rejection, Tokyo office worker Yoshida stumbles home, drunk and frustrated, to find a high school girl sleeping on the side of the road. Rejecting her repeated attempts to seduce him, he nonetheless allows her to sleep in his apartment for the night, discovering the next morning that the girl, Sayu, is a runaway teen from Hokkaido who’s been trading sexual favors to get by for the past six months. Nobly continuing to refuse to sleep with her, Yoshida instead decides to let her stay with him indefinitely in exchange for taking care of the housework.