[Nana Yagi's first full-scale rape] Nana, a teacher, witnesses bullying in her first class. She disciplines the students strictly and the bullying seems to have subsided, but... she becomes the target of bullying due to resentment. Her subjective parents are powerful, and they hold her weaknesses, so she is unable to resist and is forced to use deep throat and toy training. She is gang-raped by the whole class and lives in hell. The pleasure gradually erases her disgust, and she begs with an ahegao face, "Give me more..." She is transformed into the class's sex slave teacher...