God of War Crazy Son-In-Law

Ten years ago, his family was exterminated and he fled away from home. After ten years of fighting as an iron-blooded warrior, he swept across the world, shocked all directions, and became a god of war! I wanted to enjoy glory and wealth, but my wife and daughter suffered. Old grudges have not been avenged. One man forced himself into a wealthy family, wiped out all the clans with invincible power, and killed all the little ones! Now, the God of War has returned and the Emperor has come to this world. You, the proud son of heaven and the overlord of the country, must kneel down and bow your heads!