The Grudge Between Me and the Demon Lord

I was actually reborn, but it happened that I was reborn at the same time as my mortal enemy, the Demon Lord. I was in my own body, but he was in someone else's body. He used other people's bodies to disgust me, and I used my own body to disgust him. Right and wrong, love and hatred, all are confused and thunderbolts. Everything about right and wrong, merit and demerit, is destiny... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.