Shibire Kurage (1970)

Starts with a priest-looking dude and a few others chatting up a slim brunette with dark wavy hair in a bar. Things heat up fast when two Asian guys in casual shirts get close, one whispering in her ear while she sits between them. The real action kicks in when she leans into a car window and goes down on a white guy in glasses—outdoor blowjob with decent lighting so you see everything. Back inside, it’s a full-on group thing: one guy getting head while holding a cigarette, another getting sucked off on a couch. The brunette’s got a tight body and takes charge, switching between guys without missing a beat. Camera work’s solid, close-ups on the oral and enough angles to keep it interesting.