oomura karasu, katsuragi lilja, gakuen idolmaster, idolmaster, highres, 1girl, :o, alternate breast size (larger), blue collar, blue eyes, blue shorts, blush, bouncing breasts, braid, breasts, buttons, collar, collared shirt, covered erect nipples, emblem, gym uniform, large breasts, open mouth, outstretched arm, screenshot inset, shirt, shirt tucked in, short hair, short sleeves, shorts, signature, simple background, sweat, unaligned breasts, white background, white hair, white shirt