Kokoro, a busty gal with a G cup, is called to a hotel by her teacher. The teacher, who is giving her sex education, is stubbornly showing off her immoral clothing. Even in her uniform, her huge breasts are visible. He gazes at her, licking them as he gazes at her. The masochistic Kokoro begins to feel aroused by his gaze, her breasts shaking, and her crotch throbbing. The teacher persistently and thoroughly massages her breasts through her clothes, bringing her to orgasm. The teacher then makes her masturbate. Watched intently as she masturbates, Kokoro's fingering becomes increasingly intense. The big-breasted sex worker's cock is rock hard, and he offers it to Kokoro, giving her sexual instruction in blowjobs and titjobs. The teacher ejaculates on Kokoro's soft, young breasts with a titjob! Then, after having her give him a clean-up blowjob, his cock becomes erect again! The sex worker's huge cock is inserted into Kokoro's wet pussy. As he thrusts violently, Kokoro's big breasts jiggle wildly. He thoroughly enjoys kneading and licking them, and after teaching her how to move her hips, the teacher gives her a titty fuck and cums! He dresses Kokoro in a school swimsuit and takes her to the shower. The teacher rubs her big breasts while rubbing lathered body soap over her swimsuit, making the busty gal tremble with pleasure. He takes her big breasts out of the swimsuit, puts the lather on her chest, and gives her a titty fuck and blowjob, resulting in a massive cumshot! And so the sexual education continues. This time, fellow teachers join in, giving Kokoro even more sexual instruction in a private hotel room. He drips lotion on Kokoro's big breasts and slowly kneads them. He sucks them dry, making a lotion-filled sound. He continues cunnilingus on Kokoro's genitals. As Kokoro's big breasts continue to tremble with the use of rotors and vibrators, she is made to give blowjobs and titjobs to the men's fully erect cocks one after another, and receives their sperm on her breasts. The big-breasted instruction is not over yet. One after another, huge cocks are inserted into Kokoro, and her big breasts shake with the violent thrusts. Furthermore, while kneading her big breasts, they instruct her in acrobatic positions. As Kokoro comes over and over again, a group of men continuously splash their sperm all over her big breasts!