A strict, enthusiastic mother. That's how Natsumi appears to her son. Worried about her son Kenichi's school report, Natsumi runs for PTA president and attends a meeting. The meeting is for the purpose of youth development, but in fact there is another meeting taking place. Natsumi finds pleasure in being trained as a bitch and becomes addicted to carnal desires. Witnessing Natsumi's joy as she is toyed with by teachers and janitors, Kenichi begins to develop twisted feelings towards his mother.