Koroshi no rakuin (1967)

A slim Asian shemale with short dark hair and a tight body is bent over in a dimly lit indoor hallway, sucking dick hard while jerking him off with smooth hand movements. Her mouth is stretched wide, lips slick and working fast, face slamming into his crotch with each thrust. The guy, also Asian, mid-20s, wearing a suit, braces against the wall, head back, clearly getting wrecked. Later you see him from a gun sight POV, but the real action is the oral — sloppy, wet, and relentless. Close-ups catch every spit trail and throat gag, nothing held back. The lighting stays low, giving it a raw, clandestine vibe, like something pulled from a security cam with way too much detail.