(masterpiece, best quality, photorealistic, ultra-detailed), 1girl, Siobhán O'Rourke, 18 y.o., Irish, pale freckled skin, emerald green eyes, long ginger ponytail messy and damp, hyper-curved schoolgirl body with bouncing full breasts and wide hips, completely nude except tartan pasties and matching choker, sitting on classroom desk in deep reverse cowgirl squat, ass raised and spread wide, glistening skin reflecting soft candlelight, silver nipple clamps with dangling bells, cheeks flushed and glossy, eyes rolled back, lips parted in moan, sweat running down thighs, papers scattered around floor, dim candlelit classroom with gothic windows, cinematic shadowplay and highlight glow on skin and fluids,