I Am a Good-For-Nothing Prince and I Rely on Engineering and Infrastructure to Unify Me.

The hidden dragon is in the abyss, ready to go. He must rely on the knowledge of his previous life to accumulate strength step by step in this troubled world, counterattack, take back everything that belongs to him, and protect the people around him. In the end, he will stir up the world, build a prosperous empire of his own, and even go further into the universe.