Man on hands and knees, getting fucked from behind

The guy is on his hands and knees on a thick, shaggy rug. He’s shirtless, has short brown hair, and a black collar with studs around his neck. A chain runs from the collar down his arm. He’s looking up, head tilted back, as someone behind him is fucking him. The person fucking him is wearing black pants and is standing over him, their foot visible in the frame. The guy’s hands are flat on the rug, fingers spread. The room has wood floors and the rug is gray and beige. The vibe is intense, sweaty, and raw. No one else is in the shot. The guy’s face is mostly hidden, but you can tell he’s into it. The person fucking him is mostly out of frame except for their leg and foot. The collar and chain suggest a dominant/submissive dynamic. It’s not a slow build — it’s straight in, no messing around.