Chikan densha: Gokuhi honban (1984)

The video starts with four Asian guys and four black guys standing on a crowded train, all in their 20s, wearing casual clothes — short hair, slim builds, looking like a mixed commuter crowd. Doesn’t take long before it cuts to an intimate bedroom scene: one of the black guys is lying on a bed with an Asian woman in her 20s, long black hair, slim body, wearing fishnet stockings. She’s giving him a blowjob, head moving steadily, mouth wide around his dick, close-up shots showing every inch. Later, they switch to missionary — he’s thrusting hard, her legs up, you can see the effort. There’s also a desk scene where the guy stands while the girl kneels in front of him again, more oral action under dim light. Final shot shows the same couple walking down outdoor steps, like they just left a building after the encounter. The contrast between the public tension and private sex is the main vibe.