Tired of being denied sex by his wife, who's exhausted from childcare, Kazuki visits a hostess club. There, he bumps into "Kana," a beautiful mother from his son's class. Though initially awkward, she eases the tension with a suggestive, "Just between us, right?" Overwhelmed by a mix of guilt and the thrilling sense of forbidden pleasure she provided, Kazuki finds himself returning to the hostess club.