The Lust Detector (1986) (Better Quality)

Blonde girl with long curly hair starts on the floor in a lounge, surrounded by three guys who look like they’re arguing over her. She’s slim, wearing tight clothes, and one guy pulls her by the arm like he’s claiming her. Next scene shows the same girl in a hallway, struggling with a brunette guy — he’s got her close, almost aggressive, like it’s non-con or rough play. Then it cuts to her on a makeshift bed near a construction site, getting fucked hard by a muscular dude, both shirtless, grinding slow but intense under a bright road sign glow. Two other guys hang back in an office setting, just watching each other, tension in the air — could be leading to a multi-man situation. The lighting shifts from warm indoor tones to cold fluorescents, giving each scene a different mood. Camera stays wide a lot, but the close-up on the guy lying down at the end makes it feel like he’s passed out or exhausted — could be aftermath or fantasy sequence.