A teacher returns to his alma mater and uses a condemned old school building as a secret location to sexually abuse and "train" his students. After he targets Saki, her classmate Ishizuka attempts to protect her by submitting to the teacher's demands in her stead. However, the teacher's obsession runs deep, as he reveals a disturbing past relationship with Saki's mother, eventually breaking Saki's will and forcing her into a state of total submission.
After Arisa is completely broken and forced into submission to protect Saki, the Master turns his attention to the beautiful new teacher, Majima Mikako. By luring her to the old school building with a mysterious video, he captures her and forces her into a life of depravity. The episode concludes with a decadent party where the teacher and students are all fully enslaved, bound together by their shared submission to the Master.