art by doppel, absurdres, anal, black background, black legwear, blush, clenched teeth, colored skin, cum, dark-skinned male, dark skin, demon boy, demon horns, demon tail, docu \(doppel\), ejaculation, erection, grin, horn grab, horns, long hair, male focus, nail polish, open mouth, original, penis, pink nails, purple skin, red eyes, reverse suspended congress, ruby \(nox\), sex, sex from behind, shiny skin, sidelocks, simple background, single thighhigh, smile, sweat, nervous sweating, tail, teeth, testicles, thighhighs, veins, veiny penis, white hair, yaoi