Why Are You All the Protagonists?

Lu Yan traveled through the Zhou Dynasty and became the fourth son of the royal Lu family. He was supposed to be lying in peace and enjoying glory and wealth, but one day he found that he was surrounded by big guys who had bad luck. A counter-attack after breaking off an engagement, a demon undercover, swordsmanship in the arena, secret grudges, and harem intrigues, all the dramas are taking turns. But these people are all his brothers and sisters... When the gods fight, the kid suffers, but fortunately he saves a hand. "All your luck belongs to me!"