Hyung-bin, who lost his job because of Corona 19, works as a courier to support his college student girlfriend, Na-ri. However, Na-ri has a sponsor, Ji-seop, whom Hyung-bin doesnāt know. Ji-seopās wife Hye-jeong masturbates due to loneliness, and Hyung-bin, who happens to be a delivery man, sees her. Hyung-bin witnesses Na-ri having sex with Ji-seop while working and is shocked and has sex with Hye-jeong in revenge.