Colleagues Yotsuha and Yuta had always clashed due to their completely opposite work styles. One night, after a client dinner, Yotsuha missed the last train and had no choice but to stay at Yuta’s place. As they drank together, their conversation shifted from work to more risqué topics… As they argued heatedly, someone blurted out, “If you’re so sure, why don’t we try it!?” And things took an unexpected turn…