1boy aged_down akaza_(kimetsu_no_yaiba) arms_at_sides bangs black_eyes black_hair bruise bruise_on_face child collarbone different_shadow eyelashes full_body hakuji_(kimetsu_no_yaiba) injury japanese_clothes khcxtbvmeo9bpbm kimetsu_no_yaiba kimono long_sleeves looking_away looking_to_the_side male_child male_focus sash shadow short_hair simple_background solo spoilers standing torn_clothes torn_sleeves zouri