1girl, beach, bikini, blue_sky, blush, breasts, breasts_apart, brown_hair, collarbone, day, forehead, hair_tucking, horizon, idolmaster, idolmaster_cinderella_girls, leaning_forward, looking_at_viewer, medium_breasts, navel, outdoors, paopao, pink_bikini, red_eyes, seki_hiromi, sky, smile, solo, swimsuit, wavy_hair