Yoshito and Asako have been dating for about six months. Asako lives with her parents, Yoshito is worried that they can't stay over very often. One day, Asako's parents decide to go on a trip abroad, and Yoshito thinks this is his chance and invites her over. Yoshito is excited by the spaciousness of the kitchen and rooms that only a single-family home can offer. Before they know it, the two of them start pretending to live together...