Was there a novel where the main character was a security guard?

There were many novels in which the protagonists were security guards, such as " Siheyuan: Starting from Security Guards "," All-rounded Little Security Guard in Girls 'School "," The Best Life of a Little Security Guard "," The Rise of the Soldier King City "," I Am an NPC in Word Games "," Dragon Bone Melting "," My Beautiful General Manager Wife "," Personal Expert "," God of War in the Northern Territory "," Heavenly King Little Security Guard ", and so on.