Rule 34 Dev - 10s 2013 2girls arm_behind_head bare_hips bare_legs bare_shoulders barefoot beach bikini bikini_skirt blush brown_eyes brown_hair collarbone day early_teens female flat_chest frilled_bikini frills full_body highres hips legs loli long_hair looking_at_viewer mantake matching_hair/eyes micro_bikini midriff misaka_mikoto multiple_girls navel ocean official_alternate_costume open_mouth outdoors purple_bikini ribs sand shirai_kuroko short_hair sky standing stomach string_bikini swimsuit teenage teenage_girl to_aru_kagaku_no_railgun to_aru_majutsu_no_index toes twintails water|3621047710