Erosu purasu gyakusatsu (1969)

Alright, so you got two skinny Asian chicks with dark hair and a dude going at it in what looks like a traditional Japanese room. The girls are both slim, one with an updo and the other with short hair, and they’re not holding back. The guy’s got them both bent over, switching between doggy style and the girl riding him reverse cowgirl—good angles on that ass. One of the girls is really into it, moaning loud and grabbing her tits while she gets pounded. The lighting’s natural, so you can see everything clearly, no shitty filters or bad angles. The room’s got sliding doors and a window, so it’s bright enough to see all the action without any grainy crap. They switch positions a bunch, and you get a solid mix of girl-on-girl grinding before the guy joins in again. No weird plot, just straight-up fucking with some hot oral thrown in.