2girls air_bubble anklet barefoot bikini black_eyes blonde_hair breath brown_eyes bubble bubble_blowing commentary_request diving fang freediving harem_outfit highres jewelry lens_flare long_hair marin_(umi_monogatari) multiple_girls ocean pink_hair pointy_ears poker-face-008 stingray swimming swimsuit treasure_chest twintails umi_monogatari underwater urin_(umi_monogatari) very_long_hair water