1girl, ball, beach, beach_umbrella, beachball, bikini, blush, book, breasts, cleavage, collarbone, earrings, full_body, idolmaster, idolmaster_cinderella_girls, jewelry, karlp346pro, looking_at_viewer, mat, medium_breasts, navel, outdoors, purple_bikini, sagisawa_fumika, sitting, smile, solo, swimsuit, thigh_strap, umbrella, wariza