At the end of Hayase Risa 2nd year of her teaching life, and incident happened in the class that she was in charge. A certain boy, tried to have his way on a certain girl. She was there just by chance, it was an authentic rape attempt regardless of how anyone saw it. However, because it took place in the school, the incident was decided to not be made public. One day after the incident, Risa received a phone apology from the father of the boy that started the incident. And from the same father, she got a proposal to change the sex education. "The rape incident happened because there wasn't an adequate sexual knowledge" or so he said. Although she thought that "there's some truth in that opinion", she noticed that this phone apology was more in the form of him shifting responsibilities. However, there was a reason why Risa wasn't able to turn down his proposal. And it was that that boy's father... Kurata Michio, was what is called a monster parent.