Yuka, a sophomore in high school, has a handsome and kind boyfriend, Sena-kun, whom she just started dating. However, Sena-kun has a unique ability to change his face and personality when he sleeps! This is a slightly mysterious love story between Yuka and Sena-kun, whose face and personality change every day of the week from Monday to Sunday. (Source: Japanese = natalie.mu || Translation = MyDramaList)