The stalker man targeting college girl Akari attacks her on a dark street and imprisons her in a ruin. "The outside is dangerous," "I'm the only one on your side," he brainwashes her, starting a life just the two of them. He demands sexual favors in return for procuring food, forcing her to take his penis in her mouth. Feeding Akari when she is hungry, he instills trust and affection, repeatedly having unprotected sex with her like lovers. In the empty, closed space, they distract themselves with recreational sex. Akari begins to think about living here with the man she loves for the rest of her life. And on the 185th day...