【It has been adapted into an anime! New editions 1-7 and manga adaptations 1-9 are now available!】 I, who mastered the art of Yin-Yang and commanded countless youkai, was known as the strongest Yin-Yang master in history—yet I was on the brink of death in a burning mansion due to plots and betrayals. In the hope of finding happiness in the next life, I attempted the secret art of reincarnation in my final moments. The ritual was successful, but... I was reborn in a different world! Four elemental magics? I don't really need them. I still have the powerful youkai I sealed in the other world and my mastered Yin-Yang techniques at my disposal. *This work is also posted on Kakuyomu.