Yuko enjoys a modest but happy life with her husband and son. When the family moves into a new apartment, the son begins attending a nearby kindergarten, where Yuko meets four mothers of children in the same grade. Yuko had assumed that the long years of competing with other women in school, job-hunting, and marriage would finally end after giving birth however, what awaited Yuko was the reality that entrance exams are not for the child, but actually for the parents; women nowadays have to learn to mingle within "mothers' clubs" and entrance exams for well-known elementary schools.