Mr. Odagiri and his student, Kousui Jun, have a forbidden relationship. Although they are teacher and student, they also have a relationship between a man and a woman. They began their relationship in the spring of their second year, but because of Odagiri's position as a teacher, he didn't make any moves on his own. However, Jun kept pressuring him, saying, "If it's just a blowjob, it's not fornication, right?" and he ended up sucking him off all the time at school. Then, as time passed, on the day of the graduation ceremony, he went to a hotel with Jun, his diploma in hand, and years of feelings and restraint were finally released, and they had creampie sex over and over again.