The sound of wings lives with her mother. When she goes to pay the rent in place of her busy working mother, she is told there is debt, and offers to be a helper for her mother! The landlord, who says he'll hire her for anything, is a fundamentally lecherous old man, and naturally demands even lower services. It escalates from handjobs, paizuri, and fellatio to forced unprotected sex. Reluctantly, she opens her body, becoming the landlord's plaything, but before long...