The Foolish Son-in-Law of the Great Tang

He accidentally transmigrates to the Tang Dynasty, during the Zhenguan era, and becomes Li Shimin's son-in-law. From then on, he enjoys the satisfying life of beating up whoever he wants. "Is Lu Heng pretending to be harmless while hiding his true strength, or is he really just an idiot?" Li Shimin wonders for the nth time. Just then, Fang Xuanling rushes into the imperial study, nearly in tears. "Your Majesty, your son-in-law Lu Heng has beaten someone up again! Not a single one of the Five Surnames and Seven Great Houses has been spared!"

Li Shimin covers his forehead. "No one died, right?"

At the gates of a great clan's residence, Lu Heng stands with his hands on his hips, swaggering. "Who else? Come out and fight me together! My father the emperor said I can't kill anyone, so don't be afraid to come out!"