Dark room, chains, one person on the floor

It's a dimly lit room with wood walls and a mirror on the back wall. One person is on the floor, strapped down with chains, their back arched. Another person, wearing a dark robe or coat, is standing over them, leaning in close. The person on the floor has their head tilted back and arms pulled up. The standing person is holding something near the other’s neck or chest. There’s a bed or couch in the corner with some clothes or fabric on it. The whole scene feels tight and private, like something happening behind closed doors. No one else is visible. The lighting is low, casting shadows that make the mood feel heavy and focused. The person standing seems to be in control, while the one on the floor is completely restrained. It’s quiet and intense, no sound or movement beyond the two people.