The Lord of the Castle and the Rogue

Xiao Shiyilang is a little bad, but adorably so. He makes it his mission to help the poor and defend the weak, living a carefree, roguish life until he meets Lian Chengbi, a young master from a prestigious family in the capital and the new lord of Lian Castle. The two are unexpectedly swept up in the fight over the Deer-Splitting Blade, a mysterious treasure from martial arts legend that everyone covets. As they fight side by side, they become each other's most loyal friends, and then sweethearts.