Mr. Yumi, who was beautiful and kind, was always adored by students. One day, I was hit by a train on my way home. He was jealous of his nephew, and fell in love with all he could. The next day, Yumi was threatened by a student who had witnessed his elbow. When it was not known to the school, Yumi, who had no choice but to become a good student, was turned into a sex toy by the students.