After Becoming Son-in-Law for My Brother, I Rise to King

A modern orphan accidentally travels through time, possessing seven-year-old Prince Lin Feng of the Southern Viceroy. He takes his younger brother's place as a hostage in the capital, feigning madness to survive for thirteen years. Upon finally returning home, he expects to protect his family and benefit his loved ones, only to face cold stares and betrayal from his clan. Heartbroken, Lin Feng decisively leaves the Lin family, ventures out alone, and begins his journey of counterattack and revenge.