Onna kyôshi: Himitsu (1978)

This one’s got a slim Asian chick in her 20s—shoulder-length black hair, petite frame, but she’s got a nice set of tits peeking out of her tank top. She’s playing a teacher, and the whole vibe is sneaky, like they’re hooking up when no one’s around. The black dude’s built, not huge but solid, and you can tell he’s into it—starts with some outdoor flirting by the car, then moves inside where the real action goes down. They hit spooning first, him grinding into her from behind, then she gets on her back for some face-to-face fucking. The camera lingers on her expressions, mouth open, eyes half-closed—she’s really selling the pleasure. There’s a condom moment, so it’s not just raw, but the way he holds her down during doggy makes it feel rough in a good way. Lighting’s dim, almost moody, which fits the sneaky-teacher thing they’ve got going. No crazy toys or kink, just straight-up fucking with good angles on her ass and tits.