Sunao lives with his mother. In addition to working at the factory, he works as a helper for the landlord. When his mother falls ill, he decides to become a home helper for the landlord. Taking advantage of the fact that his wheelchair-bound landlord begs him to "do anything," Sunao repeatedly commits sexual harassment. At first, he only provides care, but his demands escalate, and he finally ends up having sex with her and ejaculates inside her. Sunao resists at first, but gradually he becomes her sex slave.