There is a boarding high school. One day, Haruka moves to another room. It seems her new room wasn't used for a long time. When she tidies up her room, she finds an old notebook. She opens it and a lot of erotic delusions are written in it. She gets sick of it and throws it away. But on the next day, there is a sheet of paper on the floor of her room. "Today, our teacher allowed us to rape twin-tail girls, so we did...." "What is it!?" She immediately throws it away and goes to school. Just after the second period, her classroom teacher suddenly says, "Ok, it's time to rape Haruka...."