[Get off to stunning 4K video!] Riko has started living alone in the city to pursue her acting career. To ease her loneliness, she starts hanging out in the room of her neighbor, who she often sees at the front door, and they start having sex. "Please lend me your dick," says Riko, seeking the dick of a middle-aged man whenever she has free time. Every time Riko comes to her room, the middle-aged man pours red liquid into her drink. Where will their codependent relationship lead?