Kawakami, a new part-time worker, looks young but is 10 years older than me and married. I went out drinking with her, who seems to be in the middle of a cold war with her husband, and we hit it off, and without either of us initiating it, we ended up having an affair. Once the alcohol wore off, we both came to our senses, but our sexual desires were uncontrollable once they were ignited, and we continued having sex many times after that. Having sex at home wasn't enough, so we secretly made love in the shop's bathroom and back room. So-jun, a fellow part-time worker, seems to be starting to notice us, but he still can't break off his affair with Kawakami...