Demon Slayer: I Am Black Death Mou, and I Signed the Reincarnation Eye at the Beginning

Reborn as Hei Shimo, awakened the famous teacher and apprenticeship return system, and awakened the Samsara Eye at the beginning! From now on, you can get rewards as long as you teach skills! Let's start by teaching Tanjiro to breathe normally in all the episodes! Naruto: "How do you know that I have enabled stripes? I also have Sun Breathing Technique and Blood Ghost Technique. Do you want to try it?" Sasuke: "The feeling of becoming a ghost is so wonderful..." Luffy: "Zezai, gear five!" In the comprehensive manga, Demon Slayer first, then Naruto, then Pirates. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.