There was a legend... A legend that said a young demon slayer lost her life in battle, and now that spirit saved the lives of other young demon slayers at the point of death, but there was no way to tell that it was true, after all who would almost die just to see if this legend was true?

Muichiro one day had the misfortune of meeting the upper moon one on a mission, Kokushibo... 1...2...3... 4 hours, he fought for 4 hours before his body gave out, he was on the ground, deep wounds on all his body, his katana now broken in half, and the only hope he had was that the demon would run away as the sun was about to rise. The demon approached with his katana that had eyes in it, he was about to kill him with the last blow when he heard two katanas clash against each other. Muichiro saw a light in front of him, and saw the sun starting to rise and the demon starting to run away, then darkness, unaware that that spirit of legend had just saved him from a certain dead, you were that spirit