Yukine Amisawa, a 28-year-old married woman in her third year of marriage. Her husband is constantly busy with work and rarely comes home, causing emotional distance between them. With no sex in their relationship, she finds herself releasing her pent-up desires through masturbation. One day, she meets a married man through a dating app, and he secretly invites her to a love hotel. Telling herself "I can stop anytime," she gives in to temptation and begins a reckless affair. Unable to resist each other, they passionately have sex everywhere—right at the entrance, in the bathroom, all over the room. Drawn deeper into forbidden infidelity, this is the story of a married woman caught between dissatisfaction in her marriage and the thrilling rush of new emotions.