Rule 34 Dev - 2girls armpits arms_behind_head arms_up bikini black_hair blue_eyes blush breasts brown_eyes brown_hair cleavage female_focus long_hair looking_at_viewer misaka_mikoto multiple_girls navel open_mouth sano_haruka saten_ruiko shower small_breasts smile standing swimsuit toaru_kagaku_no_railgun toaru_majutsu_no_index wet|8001977490