akiyomi, amaya tsubame, gakuen idolmaster, idolmaster, highres, 1girl, aqua eyes, armchair, bare shoulders, black hair, black leotard, black thighhighs, blush, breasts, chair, covered navel, cross-laced clothes, cross-laced leotard, crossed legs, demon girl, demon tail, demon wings, detached sleeves, dutch angle, feet out of frame, leotard, long hair, long sleeves, looking at viewer, medium breasts, mole, mole under eye, nail polish, parted lips, ponytail, red nails, sitting, solo, tail, thighhighs, v-shaped eyebrows, wings