Manabu, an unpopular employee, is asked by his cool junior colleague Yuuki to host a mixer. However, the girl he is dating turns out to be a young mom! Miho, who lost her husband in an accident six months ago, tends to stay at home, but today her best friend Ayumi forcefully invites her to join them. The two are put off by Manabu's boring personality. However, his hobbies improve his reputation. Ayumi, who likes Yuuki, invites him into another room, and when Manabu is left alone with Miho, they start playing a dirty game that involves stripping off clothes, but...