Rule 34 Dev - 10s 1girl arm_support bare_legs bare_shoulders barefoot bikini black_hair blue_bikini blue_eyes blunt_bangs blush breasts female_focus full_body hair_ribbon hairband kuromukuro looking_at_viewer navel red_ribbon ribbon shirahane_yukina short_hair simple_background sitting solo swimsuit yokozuwari yuu_(1007yu)|7390750302