Momoka, the graduate student, returns in her second appearance! This super intelligent and incredibly horny girl fully showcases her massive J-cup breasts. If you were wondering "Who the hell is Momoka?" after her first release, check out the highly praised File No.1 already on sale. The love scene where I can't hold back any longer after enjoying her smooth, fair skin, light pink areolas, and huge breasts under the shower—having her wash my erect cock with her massive tits—is unbelievably erotic. The indescribable pleasure makes me climax all by myself. This time, to satisfy Momoka's insatiable curiosity, we've invited a younger male colleague who's obsessed with big breasts for a wild 3P! She also treats us to an extra-special performance in a super-sexy nurse cosplay. The interaction with the junior starts immediately—no formal greetings—his face dives straight into the deep valley between her breasts, an ultimate display of eroticism. Reaching around her back, he vigorously gropes her J-cup breasts, making Momoka squirm and moan in ecstasy, driving me wild with desire. While the junior attacks her pussy with an electric massager and vibrator, she begs me to massage her too, prompting a position switch. As I squeeze her sensitive, massive breasts, she gets pounded by the junior's vibrator and receives a blowjob—this ultimate 3P scene is pure heaven! Sorry, junior, but as her senior, I take priority and go first. I take her from behind, then Momoka turns around and greedily sucks my cock with loud, slurping sounds—making me a little jealous. The junior looks eager to take over again, so we switch positions once more. Full of energy, he starts thrusting at a rapid pace, making her huge breasts swing wildly back and forth, slamming left and right—this is the true power of massive tits on full display! At this point, I can't resist and want to be sandwiched between them again, so I enjoy a passionate titty fuck while the junior keeps pounding her. Momoka, a real graduate student, skillfully performs titty-fuck with expert precision using her breasts. Whoa—this feels so damn good! After my explosive orgasm, Momoka switches roles and becomes the camerawoman. Meanwhile, right next to her, the junior shows zero restraint—despite knowing I'm watching—and goes at it hard from behind in front of the mirror, trying various intense positions. We capture every moment in 4K, especially the way Momoka's massive J-cup breasts jiggle like American crackers! Damn, Koyuen is the best!