A special class prepared for me who has a sexual desire so much that I start masturbating during class and is in danger of graduating. The homeroom teacher is Mr. Morisawa, a beautiful female teacher who is rumored to have all the boys at the previous school. The teacher wears a chastity belt on my crotch, and if I get a good score on the test, I will remove it and ejaculate, and if I get a perfect score, I will have sex. I was excited to have such a beautiful teacher write to me, and I worked my studies with the goal of graduating ...... virginity.