In the dimly lit dungeon, Etsuko's slave kneels, awaiting her command. She approaches, her heels clicking on the stone floor, a wicked smile playing on her lips. She runs a finger along his spine, tracing the path she'll soon take with her strap-on. The slave shudders, his ass clenching in anticipation. Etsuko chuckles, enjoying his nervousness. She lubes up her cock, then presses the head against his tight entrance. He tenses, but she slaps his ass, commanding him to relax. He does, and she slips inside, inch by inch, until she's fully sheathed. The slave's moans fill the dungeon as Etsuko begins to move, fucking him slowly at first, then building to a punishing pace.