Keiichiro has been married for seven years and has no children. One day, Maria suddenly runs away from home. Worried about Maria's health, Keiichiro visits her mother-in-law Ririko, but... However, even if he asks Ririko, he doesn't know where Maria is, and Keiichiro blames himself, saying, "Why couldn't she have paid more attention?" Seeing her son-in-law like that, Ririko can't take her eyes off the fact that her daughter is tormenting Keiichiro...
