Records of Experiences from Other Worlds

What kind of chemical reaction will occur when the soul of a thousand-year-old immortal meets the body of a thousand-year-old demon emperor? This is a war you have to fight! The fate has been decided! It is not the dead who sleeps forever. In the long and strange time, death also has its end! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.