1girl, o, b1ack_illust, bikini, blunt_bangs, blush, breasts, breasts_apart, brown_hair, collarbone, idolmaster, idolmaster_million_live!, jacket, large_breasts, long_hair, looking_at_viewer, matsuda_arisa, navel, open_clothes, open_jacket, red_bikini, simple_background, solo, striped, striped_bikini, sweat, swimsuit, twintails, undressing, very_long_hair, white_background, white_jacket