A woman secretly has an affair with her beautiful, older-looking mother friend, with whom she shares a sexual fetish, at a box-shaped hotel. (Kana Morisawa, DASS-465)

My wife, exhausted from childcare, was unwilling to have sex with me, so I went to the "Box Girl" (a brothel/restaurant). There, I met Kana, a beautiful mom from my son's class. Although I felt embarrassed, she gently said, "This is a secret between just the two of us, okay?" and helped me out of my predicament. Although I felt guilty, I returned to the "Box Girl" because of the sense of betrayal and the thrill I felt from my wife's friend.