1girl, b1ack_illust, bikini, black_hair, blush, bow, breasts, brown_eyes, collarbone, hair_bobbles, hair_ornament, hand_on_own_leg, hugging_own_legs, idolmaster, idolmaster_million_live!, idolmaster_million_live!_theater_days, knees_together_feet_apart, loli, looking_at_viewer, nakatani_iku, on_bed, one_side_up, open_mouth, parted_lips, short_hair, simple_background, small_breasts, solo, swimsuit, white_background, white_bikini