Nana's father left home after getting into debt, and now she lives with her mother. In an attempt to ease her mother's burden, she decides to become a home helper for her landlord. Taking advantage of Nana's request to "do anything" - as she is wheelchair-bound - the landlord repeatedly commits sexual harassment. At first, he only provides care, but his demands escalate, and he even ends up having sex with her and ejaculating inside her. Nana resists at first, but gradually becomes his sex slave.