1girl, bikini, black_bikini, blush, breasts, cleavage, collarbone, front-tie_bikini_top, front-tie_top, huge_breasts, idolmaster, idolmaster_cinderella_girls, katagiri_sanae, looking_at_viewer, marder_drei, mouth_hold, narrow_waist, orange_hair, scrunchie, simple_background, solo, swimsuit, twintails, upper_body, wrist_scrunchie