Coworkers Saeko Hiiragi and Takahashi are secretly involved in a passionate affair, stealing moments together whenever work allows. Both are married and unable to see each other freely, yet they share a mutual dream: to escape their ordinary lives, even just once, and indulge in nonstop sex from morning until night. For months, they meticulously planned this fantasy, using a business trip as a cover for their illicit getaway. On the day of departure, meeting at the station, they shed their work suits, changed into casual clothes, and eagerly boarded the bullet train. The moment they arrived at their destination, they passionately kissed, marking the beginning of their forbidden affair.