Three Kingdoms: I Run Into Dian Wei and Make Him Swear Brotherhood with Me from the Start

I transmigrated to the final years of the Eastern Han dynasty and ran into bandits causing trouble. I drew my blade and cut them down. After I killed them, a burly man appeared and fought alongside me. When it was over, he said his name was Dian Wei, and that he was fleeing after killing someone back home. I asked him to become sworn brothers with me, and he dropped to one knee and called me big brother. Before the words had even left his mouth, a steward rushed over, knelt before me, and called me young master. Just what kind of family does this body belong to?