The Ultimate Live-In Son-in-Law

A cunning warlord schemes to build an empire, while a valiant general defends his homeland. Once, he ruled the battlefield and held power over the entire court. Now, gravely wounded and mute, he willingly becomes a live-in son-in-law. Though treated with disdain, he is content with simple meals. For her, he will ascend to heaven and transform into a dragon, protecting her for the rest of her life.