The Female CEO's All-Powerful Soldier King

The King of Mercenaries, once renowned throughout the mercenary world, retires from the life of a fighter and returns to the city. Determined to start over as a construction worker, he finds his fate unexpectedly intertwined with that of a beautiful CEO. After becoming her bodyguard, he promises to protect her for the rest of her life, and she promises him a lifetime of splendor.