art by nyantcha, 1girl, shuten douji (fate), solo, horns, oni horns, ass, anus, pussy, oni, purple hair, on stomach, uncensored, lying, spread ass, skin-covered horns, purple eyes, short hair, makeup, looking back, open mouth, looking at viewer, eyeliner, smile, blush, ass focus, bangs, teeth, presenting, headpiece, from behind, thighs, grabbing own ass, ass grab, bob cut, puckered anus, eyeshadow, deep skin, upper teeth only, fingernails, hands on own ass, black background