Kasumi lives with her mother. Her mother is often ill and the family finances are tight, so she offers to work as a helper at her wheelchair-bound landlord's house to help with the rent. However, the landlord is a dirty old man who demands that she take care of her private parts as well, citing the overdue rent. Things escalate from handjobs, titjobs, and blowjobs, to being forced to have creampie sex. With her weakness exposed, Kasumi has no choice but to submit, and despite her reluctance, she opens her body to the landlord and becomes his plaything...