art by doppel, 1boy, agatsuma zenitsu, black legwear, blonde hair, blush, brown eyes, closed mouth, feet, fundoshi, japanese clothes, kimetsu no yaiba, kimono, looking away, lying, male focus, male underwear, nipples, on side, pectorals, rokushaku fundoshi, shota, soles, solo, spread toes, sword, symbol-only commentary, tabi, toe socks, toes, trap, triangle print, underwear, underwear only, weapon, white male underwear