art by doppel, 2boys, bad id, bad pixiv id, bare pectorals, bare shoulders, black legwear, black sclera, blonde hair, blue skin, blush, colored sclera, colored skin, demon boy, docu \(doppel\), elbow gloves, gloves, heart, horns, large testicles, looking at another, male focus, mars symbol, monster boy, multiple boys, open mouth, original, pectorals, platinum blonde hair, ponytail, purple skin, sidelocks, spoken heart, spoken mars symbol, straddling, tail, testicles, thighhighs, toned, toned male, yaoi, yellow eyes