University student Konishi starts working the same shift as Ichika Hoshimiya, a married woman who recently began part-time work at his convenience store. Despite her slender, elegant appearance, Ichika unconsciously exudes erotic charm, drawing Konishi in and prompting him to invite her out for drinks. Ichika's husband works from home and has seen a drop in income, forcing her to support the household financially through her part-time wages. Learning that her husband is cheating and that Ichika herself is sexually frustrated, Konishi sympathizes with her situation and secretly desires an intense relationship. The two agree to a one-time affair—but things don't end there.