Urban Godlike Prodigy

He was once a king of soldiers, a god of war, and a ruler of the world, with an identity and mysterious past beyond anyone's imagination. A promise brought him back to a small town. All he wanted was to quietly watch that girl graduate, get married, and have children, then live out the rest of his days in peace. But wherever people gather, there are schemes, deception, and conflict. And the world cannot be left without a master unless that master falls... Otherwise, he can only grow stronger, ever stronger, to protect everything around him!