1girl, b1ack_illust, bikini, blush, breasts, cleavage, collarbone, idolmaster, idolmaster_million_live!, idolmaster_million_live!_theater_days, looking_at_viewer, navel, nonohara_akane, official_alternate_hairstyle, red_bikini, red_eyes, shawl, shirt, short_hair, shy, sideboob, simple_background, solo, swimsuit, underboob, wavy_mouth, white_background, white_shirt, wince