1girl, black_one-piece_swimsuit, blush, breasts, brown_eyes, brown_hair, bursting_breasts, collarbone, covered_navel, cowboy_shot, embarrassed, idolmaster, idolmaster_cinderella_girls, large_breasts, looking_at_viewer, medium_hair, mizuki_seira, new_school_swimsuit, onao, one-piece_swimsuit, school_swimsuit, skindentation, solo, sweatdrop, swimsuit, white_background