1girl, bikini, black_bikini, blue_sky, blush, cloud, day, earrings, from_behind, halterneck, highleg, highleg_bikini, horizon, idolmaster, idolmaster_cinderella_girls, jewelry, jougasaki_mika, looking_at_viewer, looking_back, ocean, outdoors, pink_hair, shawl, shoulder_blades, sky, solo, starshell, swimsuit, white_shawl