The unconcerned king

The Dragon Empire is the most powerful empire in the universe. The Dragon Emperor’s rule the Dragon Empire and they worship the Dragon Gods. The story goes on how the Dragon Emperor protects his Empire from the other Gods. The first MC of the story is always unconcerned about his Empire. He is so unconcerned that he doesn’t even try to find some new powers. He doesn’t rule his Empire as it should be. So one day he gets a lesson for it by the Dragon Gods. The story goes on how he discovers and finds his power and becomes a legend in a short time before his death. The story goes on even after his death. Will his son be an unconcerned king like him or he will be the completely opposite of his father?