Rule 34 Dev - 1boy 1girl awa black_hair blush cloud day closed_eyes gem green_hair grey_eyes hair_ornament heart jewelry long_hair mermaid monster_girl mukoujima_takurou muromi-san namiuchigiwa_no_muromi-san necklace open_mouth pearl_(gemstone) rock seashell shell short_sleeves sky spiked_hair twintails two_side_up very_long_hair|4200549678