inu (aerodog), futami ami, futami mami, idolmaster, idolmaster (classic), idolmaster 1, 00s, 2girls, arm support, back, bare shoulders, blush, brown hair, candy, cute & girly (idolmaster), flat chest, food, hair bobbles, hair ornament, lollipop, looking at viewer, looking back, midriff, multiple girls, open mouth, short hair, siblings, sisters, sitting, skirt, straddling, teeth, thighs, twins, upright straddle