Rule 34 Dev - 40010prototype arm_under_breasts bare_arms bare_belly bare_legs bare_shoulders bare_thighs bikini bikini_aside bikini_bottom_aside black_hair blue_bikini blue_eyes blush breasts collarbone doujin_cover doujinshi flower_in_hair hair_ornament hot_spring long_hair lying medium_breasts microphone nipples one_eye_closed onsen open_mouth outdoors partially_submerged saten_ruiko smile spread_legs thighs to_aru_kagaku_no_railgun to_aru_majutsu_no_index tongue towel towel_around_waist water wink|12344013984