Yuka recently grows close to Kuroi, an adult student working at her part-time job. Hoping something might happen, she goes drinking alone with him and is swept up by a thrill missing from her life of housework and childcare. Unable to ignore her arousal, she accepts his desire and begins a series of time-limited affairs. They repeatedly steal quick sex wherever they can between shifts, until merely anticipating their daily encounters leaves her wet while she works.