A neighbor who pretends to be kind to 'Natsu,' a girl raised in a single-parent household, steals her underwear for masturbation. This pervert later gets laid off from his job and becomes a recluse, turning his room into a garbage-filled mess. The smell is terrible and bothersome, so she avoids him. However, after picking up his wallet, she reluctantly goes to return it and is suddenly dragged into his room. 'After all I've done for you, you dare look down on me!' She is forcibly stripped of her uniform and defiled with semen. The girl, who has been repeatedly subjected to internal ejaculation, gradually loses her sanity.
