1girl, arms_behind_head, artist_name, bikini, blonde_hair, blue_eyes, blush, breasts, cleavage, collarbone, front-tie_bikini_top, front-tie_top, hair_tie_in_mouth, idolmaster, idolmaster_cinderella_girls, idolmaster_cinderella_girls_starlight_stage, jewelry, large_breasts, long_hair, looking_at_viewer, mouth_hold, multicolored_bikini, multicolored_clothes, necklace, ohtsuki_yui, satoyama_meu, simple_background, solo, sunlight, swimsuit