1girl, bare_shoulders, barefoot, blush, bow, breasts, brown_eyes, brown_hair, casual_one-piece_swimsuit, cleavage, closed_mouth, collarbone, hair_bow, hair_ribbon, idolmaster, idolmaster_cinderella_girls, idolmaster_cinderella_girls_starlight_stage, knees_together_feet_apart, knees_up, kuroba_aki, long_hair, looking_at_viewer, lying, medium_breasts, multicolored_clothes, multicolored_swimsuit, ogata_chieri, on_back, one-piece_swimsuit, partially_submerged, ribbon, shy, smile, solo, sunlight, swimsuit, twintails, wet, wet_clothes, wet_hair, wet_swimsuit, white_ribbon