Demon Slayer: Kimetsu No Yaiba: Day and Night

During the Warring States Period, a genius swordsman named Ji Kuni Enichi was born. He created a breathing method that could deal with evil spirits. Until one day, he met a confused swordsman and found a direction for him. The confused swordsman created his own breathing method. The breathing method was passed down from generation to generation until a certain generation, a defecting ghost created his own force and continued to do evil. One day, a young boy named Okiren Tenmeuro returned home and witnessed his mother using breathing techniques to kill three evil ghosts. He also learned the fate of his family from his mother's mouth. He found a book about breathing techniques among his deceased father's belongings. Under his mother's teachings, he continued to practice breathing techniques and embarked on a journey to become a swordsman who kills evil ghosts and to solve the mystery of his family... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.