College student Akari Neo is attacked by a male stalker and imprisoned in an abandoned building. The man tells her, "The outside world is dangerous," and "I'm the only one who's on your side," forcing her into an isolated life with him. In exchange for providing food, he demands sexual services, forcing her to perform oral sex. As Akari grows hungry, he feeds her, gradually planting seeds of trust and affection. Soon, they begin having creampie sex repeatedly, like lovers, indulging in pleasure within the confined space. Captivated by the man's words, Akari starts thinking, "I wouldn't mind staying here forever." However, on the 185th day, a new event occurs.