Yuna and Samejima, who work at the same workplace, are having an affair in which they secretly seek each other's bodies. - The two, who both have families and cannot meet freely, had the same dream. - ``I want to have sex from morning till night without being disturbed by anyone, even if it's only once.'' In order to make that desire come true, an affair trip called a business trip was planned several months in advance. - On that day, the two met at the station, changed from suits to casual clothes, enthusiastically boarded the Shinkansen, and as soon as they arrived at the hotel, they passionately captured each other's lips...