I, The Strongest Demon, Have Regained My Youth

I, The Strongest Demon, Have Regained My Youth?! is a web manga available in Bilibili Comics.
== Synopsis ==
In order to maintain his rule, Xin Sheng, the eternal demon king who ruled the world, went deep into the demon realm to find the highest and strongest power. Thousands of years later, he has become stronger and younger, and the world has also changed...