Mari, a female teacher, notices that bullying is happening in her class. She tries to get the truth out of the victim, but he has completely shut Kokoro off and refuses to say anything. Determined, Mari invites Kato, the leader of the bullies, to her house to try to persuade him to change his ways. Mari, who is earnest and has a strong sense of justice, desperately tries to persuade him, but Kato doesn't listen to her at all...