arayama reiichi, koakuma, embodiment of scarlet devil, touhou, 1girl, bat wings, blush, bottomless, breasts, cleavage, demon tail, dress shirt, female focus, gradient background, head wings, heart, huge breasts, long hair, naked shirt, navel, nipple slip, nipples, no panties, open clothes, open shirt, red hair, shirt, simple background, smile, solo, spoken heart, tail, tongue, white background, wings, yellow eyes