The Unwanted Goofy Son-in-Law

Transmigrating into a feudal empire as a frivolous young aristocrat, an easygoing slacker desires nothing more than a peaceful, lazy existence. His carefree ambitions collapse when he finds himself betrothed to the realm's imperious royal princess, prompting him to stage ridiculous blunders to force an annulment.

Unfortunately for his leisure plans, every eccentric blunder he commits inadvertently solves state financial crises and crushes opposing barbarian legions. Hailed by the imperial court as an unmatched military genius and national savior, the reluctant hero finds his arranged marriage more permanent than ever.