Teacher's Secret: Top Teacher Gao Biru is Trained into a Bitch by Her Boyfriend (Complete Series)

High-level teacher Gao Biru is originally a dignified and intellectual beauty, but her boyfriend discovers her secret fetish, leading her to degenerate into an obedient bitch. Her boyfriend whips her snow-white perky ass with a leather whip, forces her to kneel and deepthroat his cock while swallowing cum, collars her and makes her crawl begging for creampie. In the classroom, she's bound and suspended, with nipple clamps and candle wax torturing her breasts, her pussy stuffed with a vibrating egg causing squirting orgasms, convulsing in climax as she cries out "Master, spare me!" Ultimately, she becomes a complete fleshlight, taking fierce doggy-style pounding in her raised ass, pussy juices splashing everywhere, moaning lewdly non-stop—such a thrilling contrast slut!