Rika, who works in the sales department, struggles with a jealous husband and a troubled married life. One day, she is forced to stay overnight at a nearby inn with her colleague Takeda for a business meeting with a client, but her suspicious husband strongly opposes the trip. Amid this tension, Takeda empathizes with Rika's suffering, draws close to her, and finally steals a kiss. That single moment becomes a turning point, leading their relationship into uncharted territory.