Manga [EN/RAW] I, the Strongest Demon, Have Regained My Youth?! is written by Updating. This manga contains the following genres, Comedy, Fantasy, Harem, Manhua. [ 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... ]