My Useless Husband is the Mercenary King

Simon, the legendary mercenary king known as "Grey Wolf," conceals his identity for five years to repay a life debt to Mr. Hale, serving as a live-in security guard while secretly protecting the Hale family and his wife Chloe. Manipulated by a traitor within the family, Chloe publicly fires him and demands a divorce. Simon leaves in anger, taking his entire security force. That night, hostile forces invade the manor, forcing a remorseful Chloe to beg for his help.