Ikenie tenshi (1988)

Alright, so this one’s got a bunch of skinny Asian teens—three dudes and one girl—all packed into a small room that looks like a dorm or apartment. The girl’s got long black hair and is the center of attention, getting kissed and touched by all three guys at once. They start with some heavy making out, hands everywhere, then one of the dudes goes down on her while the others watch or wait their turn. The lighting’s dim, kinda grainy, which gives it this raw, intimate vibe. Later, they switch it up—doggy style, riding, you name it. The camera gets right in there, so you see everything, especially during the oral parts. No fluff, just straight-up group action with a tight, young cast.