Ichika is a female teacher who is about to get married to her colleague Maeda. Due to a certain incident, Bob, a black janitor, discovers her weakness and rapes her! Maeda sees the scene, mistakes it as cheating, and unilaterally breaks off the engagement. In despair, a crazy Maeda bursts in during class and, together with the students, turns Ichika into a sex slave! Creampie! Squirting! "I'll do anything...so marry me."