Despite being an ordinary office worker, Kazuma has a specific inclination towards anal play. This peculiar preference has led him to refrain from masturbating for a fortnight. On a weekend, he gives in to his urges in a sanitized and sound-insulated hotel room. To his surprise, Kazuma crosses paths with a subordinate from work, Maruyama, who invites him for a drink. Later, while helping the drunken Maruyama to bed, Kazuma notices the remarkable erection of his colleague.