Honami, a housewife in her forties, drifts through a stale marriage until Yuki, a younger adult college student, starts working at her restaurant. His clumsy but earnest effort gradually catches her attention, while he develops both admiration and romantic feelings for the older married woman. When a rainstorm unexpectedly brings him into her home, Yuki finally confesses his desire. Their relationship deepens from there, and soon they are losing themselves in forbidden sex even during their shifts.