kotatsu-mazoku, original, highres, 1girl, ahoge, black dress, black hairband, black shoes, blonde hair, blue eyes, blush, closed mouth, curled horns, demon girl, demon tail, dot nose, dress, drill hair, frilled dress, frilled hairband, frills, full body, gloves, grey horns, hairband, horns, long hair, looking at viewer, pantyhose, shoes, short sleeves, sidelocks, simple background, smile, solo, standing, tail, twin drills, twintails, white background, white gloves, white pantyhose