A female teacher, Mari, who noticed that bullying was happening in the class she was in charge of. She tries to get the truth out of the student who was the victim of bullying, but he shuts his mind completely and refuses to speak. Her determined truth persuades Kato, the leader of the students she was bullying, to call her home to convert her. Mari, who is serious and has a strong sense of justice, desperately tries to persuade her, but Kato doesn't listen to her at all.
