Godly Matrilocal Son-in-law

The strongest Almighty soldier king in the North was supposed to fight in the battlefield to gain fame and prestige, but in order to fulfill his promise, he became the superb son-in-law by coincidence. 
From then on, he began to live a full-time family life, a beautiful daughter-in-law, the city of desire, and the Almighty soldier king entered a battlefield devoid of smoke.