Touko has an only son who is about to enter a new school in the spring. Out of love, she had been overprotective of him, but one day she received word that her son had secretly filmed someone. This scandal occurred just as his admission was decided by recommendation. To ensure her child's education, Touko pleaded with the teachers, who then offered a condition for settlement: she must service the male teachers for just one day. While Touko initially complied for the sake of her beloved son, she soon began to realize her own masochism...
