Nanaha, who is scheduled to graduate from university this spring, went to her alma mater as an education trainee. However, the school had turned into a den of iniquity where both teachers and students had bad conduct. One day, when she took a rebellious attitude towards the head of the year, Kita, Nanaha was surrounded by Kita and told, 'What you lack is experience... You can also help with the part-time classes.' She was also surrounded by students, filmed, and had no choice but to listen to what they said... Moreover, a group of loan sharks who had lent money to Kita also appeared, and a hellish sexual education practice continued!