Kasumi lives with her mother. Her mother is often sick and the household finances are tight, so she offers to work as a helper at the house of the wheelchair-bound landlord, hoping to at least contribute to the rent. However, the landlord is a perverted old man through and through, and demands even lower body treatment as an excuse for late rent. It escalates to handjobs, pussy licking, and fellatio, and she is even forced to have forced creampie sex. Kasumi, who has no choice but to obey because she is being blackmailed, reluctantly opens her body and becomes the landlord's plaything…