Career-driven Masaki spends her days exhausted from constant after-work drinking sessions with clients, sacrificing her personal life. One day, she meets Kotaro, a college student working part-time at an izakaya, who instantly falls for her and confesses his feelings. From then on, Masaki begins devoting herself to her younger boyfriend. They grow closer through nightly intimacy, building a happy relationship—yet she remains self-conscious about their age gap, struggling with the insecurity to the point that she can't have sex unless the room lights are dimmed.