Yuka married a man with a stepson. However, her husband died in an accident, leaving Yuka and his stepson, Kazuhiko, alone together. On the other hand, Kazuhiko couldn't accept his father's death honestly and didn't like his new mother suddenly appearing. He would assault her as a form of escapism. One day, their classmate Sadaka found out about this fact. Kazuhiko begged him to keep it a secret, but the delinquent Sadaka pushed forward saying, 'Then let me have your mom too...'
