Newly appointed teacher Akari Niimura witnesses a bullying incident in the restroom just before her first class. The principal shows no concern, and the school's cover-up culture leaves Akari deeply frustrated. She decides to use her own body as a tool to help students relieve their stress and emotional burdens. Through careful explanations of anal and vaginal anatomy, she gradually opens up her students' minds. Eventually, the bullies and victims work together, demonstrating double penetration sex in a hands-on lesson, creating an entirely new form of education.