3boys, aged down, alternate universe, bangs, black hair, black hakama, black socks, charging forward, child, clenched teeth, day, forest, from side, grey hair, hakama, holding, holding sword, holding weapon, japanese clothes, jumping, katana, kimetsu no yaiba, kimono, komedawara0130, long hair, long sleeves, looking away, male child, male focus, multiple boys, nature, outdoors, pants tucked in, profile, red hair, red kimono, running, sabito (kimetsu), shinazugawa sanemi, shirt, short hair, socks, sword, tabi, teeth, tomioka giyuu, waraji, weapon, white shirt