Kokoro, a big-breasted gal with G-cup breasts, is called to a hotel by her teacher. The teacher, who is giving sex education, is wearing a stubborn, immoral outfit, and even though she is wearing her uniform, he stares at her big breasts, licking them all over. Kokoro, who is a masochist, begins to feel aroused by his gaze, her big breasts shaking, and her crotch throbbing. Kokoro's big breasts are massaged persistently and thoroughly over her clothes, and she cums, and the teacher makes her masturbate. Watched closely as she masturbates, Kokoro's fingering becomes more and more intense. The penis of the big-breasted sex worker is rock hard, and he holds it out in front of Kokoro and gives her sexual instruction in blowjobs and titjobs. The teacher shoots his sperm into Kokoro's big breasts with a titjob from her soft, young big breasts! He makes her give him a clean-up blowjob, and his penis becomes erect again! The sex worker inserts his huge cock into Kokoro's wet pussy. Kokoro's big breasts shake as he thrusts into her hard. The teacher thoroughly enjoyed kneading and licking her big tits, and after teaching Kokoro how to move her hips, he gave her a titty fuck! After putting Kokoro in a swimsuit and taking a shower, the teacher rubbed her big tits while applying lathered body soap over the swimsuit, making her sensitive body tremble and feel pleasure. The teacher took her big tits out of the swimsuit, put the lather on her chest, and gave her a titty fuck and blowjob, and she cummed a lot! And so the sex education continues. This time, her fellow teachers join in, and in the hotel, they give Kokoro more sexual education. They pour lotion on her big tits and slowly knead them. They suck her big tits dry, making sucking sounds. They continue to lick Kokoro's genitals. Kokoro's big tits are made to tremble with a rotor and a vibrator, and she is made to give a blowjob and titty fuck to the fully erect penises of the men one after another, and she receives their sperm on her chest. The big tits education is not over yet. They insert their huge dicks into Kokoro one after another, pounding her so hard that her big tits shake. They also massage her big tits and teach her in acrobatic positions. They then squirt their sperm over and over on Kokoro's big tits!