The Invincible Marquis

A modern soul transmigrates into the kingdom's biggest playboy and lands in prison for assaulting a noble's son. When an enemy nation's envoys challenge the court, he answers the call—crushing them with poetry, music, and physics. As he uncovers a poisoning conspiracy involving the emperor himself, he allies with the world's second-greatest swordsman, gathers three hundred thousand troops, storms the palace, and takes the throne.