Two gyaru students stumble upon their homeroom teacher's secret erotic account online. Obsessed with her massive breasts, they use the videos to blackmail her and grope her mercilessly. Overwhelmed by pleasure, the teacher awakens to lesbian submission and masochistic desire. Reduced to her students' obedient perverted pet, she's subjected to relentless tongue play, nipple torment, and nighttime leash training across the school grounds. The climax unfolds with a strap-on session in the principal's office.