The "Abe family" and the "Mochida family", who live in the same apartment building, have a family relationship. One day, the daughter Momoko and Natsuki's graduation party is held at the Abe family. Surrounded by his best friends and family, it was supposed to be an unforgettable day. Nine years later, Natsuki moved to Tokyo and got married. However, Natsuki will return to her parents' house again with her husband's transfer. A reunion with Momoko... and a tragic reunion with Koji. The sealed nightmare is revived...
