A young salaryman finds a teenage girl sitting under a lamp post on his way home. She offers to sleep with him in exchange for a place to stay. He turns her down, but gives her a place to stay anyway. Their strange life together begins…

Yoshida settles into his new life with Sayu, but the people around him are quick to notice the change, and very curious about what's going on.

Sayu has an encounter with a man from her recent past, and his intentions aren't good at all.