Mr. Kimishima was invited to the graduation party of the class he was in charge of. Three days after the graduation ceremony, he gathered at an izakaya run by the student's parents. This class reunion was organized by a female student. Kimishima-sensei started dating with a male teacher she admired. Because of such a trivial reason, the teacher was raped by the whole class. "Let's all rape this woman!" The despicable mastermind turned the graduation party into a creampie party...