Chen Yuan transmigrates to the late Eastern Han Dynasty, a Xuanhuan version of the Three Kingdoms world. Even a small soldier can play with millstone-sized rocks like yo-yos. Chen Yuan feels this world is too dangerous, so he decides to cling to a powerful figure. He finds himself in Zhuojun. So, he decides to cling to Liu Bei; at least his life safety is guaranteed. Then, Chen Yuan unexpectedly becomes sworn brothers with Liu Bei, becoming the fourth brother. Chen Yuan: ??? I just wanted to quietly cling to a powerful figure, how did I end up becoming a king?