After her husband passed away, Kaoru raised her son Tatsuo single-handedly. Kaoru wondered if it was the influence of her fatherless family, or if Tatsuo was an introvert and got along well with her friends. One day, Tatsuo brings her classmate home. Kaoru couldn't hide her joy at the presence of her classmate whom Tatsuo brought for the first time, but her joy was easily betrayed. Tatsuo was being bullied by her classmates. And her classmates' misdeeds reach out to Kaoru...
