Dragon Raja: Lu Mingfei Returns from the Elden Ring

As the king of the borderlands, a god who wields the Golden Law, and sits on the throne at the base of the Golden Tree, Lu Mingfei often feels regret.
Was his choice at the time truly the right one? Perhaps he could have become the Dark Moon Witch's companion and embraced the stars;
Perhaps he should have worked harder to thoroughly fix the flaws in the law, rather than hastily restoring the legal system;
Perhaps accepting the frenzied blessing from the bottom of the royal city would save that girl...
The supreme will will not allow a second Marika to appear; Lu Mingfei can only continue to grow older as the decadent era progresses, until one day...
Lu Mingfei returned to Earth, back to his youthful days when he was 18.
A strange boy carrying his dreams and the Kassel College, which claims to be dragon-slaying elites, approach him. This time, Lu Mingfei is determined to carry out his own will, to grant redemption, destruction, and destiny according to the king's will, and never again be a puppet of the gods, and never allow needless sacrifices and tragedies.