Kana and Nishijima, who work in the same office, secretly indulge in each other's bodies, maintaining an affair while avoiding others' eyes. Since both have families and can't meet freely, they share a common desire: 'Just once, I want to forget everything and spend all my time having sex.' To fulfill this dream, three months ago they planned a business trip as a cover for their affair. On the day of the trip, they met at the station, changed from suits into casual clothes, boarded an express train, and upon arriving at the inn, they passionately kissed each other...
