Chiaki appears this time as part of the Shinjuku Koyuen Women. (She's the same girl featured in previously released File No.22, so if you haven't seen it yet, definitely check it out.) Chiaki's biggest appeal? Her massive J-cup breasts, absolutely outstanding. As we massage her huge tits and wash each other in the bath, surrounded by bubbles, her soft, pillowy breasts create an almost psychedelic sensation. You can feel your cock naturally hardening while fondling them. Her nipples are rock-hard too, both of us intensely stimulating each other. Trapped between her bubbly breasts, we move into titty-fuck territory. Receiving handjob while her nipples are sucked during this tit worship is pure bliss. After leaving the bath, we dress Chiaki in a sheer white leotard. That day, we've invited a junior who's obsessed with big tits, leading into a wild threesome. The junior immediately gets turned on, groping her breasts aggressively right through the leotard—super erotic. We douse the leotard with lotion, making her nipples and breasts clearly visible and slick, then generously coat her ass too until it's glistening. Though her ass looks amazing, we inevitably return to her tits, while also toying with her pussy. We keep massaging her massive breasts; even after multiple orgasms, the relentless vibrator buzzing continues, followed by deep, hard fucking with a dildo. Persistent guys might be annoying—but persistent lovers who keep making you cum? They're never hated… (right?) Still, what Chiaki really wants deep inside isn't a dildo—it's a real cock. And we both know it. Both me and my junior are fully ready. So who gets to go first? As the senior, I'll generously let the junior take the lead. But watching Chiaki's enormous breasts wildly bouncing with every thrust—ahh, I want to be inside her too! Come on, switch already! While the junior continues pounding her, I start sucking his cock that was just inside her, then take over and slam into Chiaki myself. The junior, still receiving a blowjob, stares at me intensely with pleading eyes—"…Senpai… soon…"—so I switch back and let him continue. Chiaki's huge tits violently shaking from the junior's relentless thrusting—wow, what a breathtaking view. The shameless junior keeps up his fierce pounding. Unable to stand anymore, we lay Chiaki down on the bed for intense, nonstop tit-mashing and deep fucking. Arching her back, she screams in ecstasy. Damn… Koyuen is the best.