By the sea, a contract binds two strangers: Han Jae Hun, a cold heir hiding pain, and Kim Hae Jun, a bright art student burdened by life. What begins as a transaction slowly softens into tenderness. Through hidden loneliness and unspoken care, they grow close—yet the contract keeps their hearts guarded. As tides rise and secrets surface, they must choose: remain bound by rules, or dare to love freely. An autumn, a villa, a story of forced closeness and real feeling, waiting for the tide to tell.