Mr. Tachibana, who joined the company as a new part-time worker, looks young, but he is 10 years older than me and is married. - We went drinking with her who seems to be fighting with her husband and hit it off, but we have cheating sex without either of us inviting her. Even if the alcohol was gone and we returned to each other, the sexual desire that was once ignited was uncontrollable, and then we repeated sex many times. It's not enough to just do it at home, and secretly overlap your body in the store's toilet or backyard. Rin, a part-time worker, seems to be beginning to notice our relationship, but she still can't break her affair with Tachibana.