2boys, aged up, black hakama, blonde hair, carrying, child, child carry, closed mouth, coat, colored tips, father and son, forked eyebrows, hakama, half-closed eyes, hand up, hands on another's chest, hands up, haori, happy, holding, holding sword, holding weapon, if they mated, japanese clothes, katana, kimetsu no yaiba, korean commentary, korean text, long sleeves, looking at viewer, male child, male focus, medium hair, multicolored hair, multiple boys, no shoes, ponytail, red hair, rengoku senjurou, short hair, sidelocks, smile, streaked hair, sword, tabi, ungungzza, upper body, weapon, white background, white coat, wooden sword