1girl, bare_shoulders, bikini, black_bikini, black_hair, blue_eyes, blush, breasts, cleavage, collarbone, day, hairband, hand_in_own_hair, holding, holding_hair, idolmaster, idolmaster_cinderella_girls, jewel_(the_black_canvas), large_breasts, long_hair, looking_at_viewer, navel, open_mouth, outdoors, sagisawa_fumika, solo, swimsuit