Late at night, teacher Shihori Endo receives a plea for help from a bullied student and comes to the classroom. However, she walks straight into a malicious trap set by delinquent students! Bound and completely helpless, she is brutally raped. Despite desperately resisting, her body writhes in constant agony. Her dignity as a teacher utterly shattered, she is reduced to their sex slave. During exams and after school, she is forced to obey their every command, completely dominated as their plaything—her days now filled with relentless abuse and submission.