Tachibana, the new part-timer, looks young but is married and ten years older than me. While she is fighting with her husband, we go drinking, hit it off, and drift into an affair without either of us making the first move. Sobering up does nothing to cool our desire, and soon sex at home is not enough: we secretly fuck in the store restroom and back room too. Our coworker Rin seems to be catching on, but we still cannot end the affair.