Uchimura Dennosuke, an ordinary office worker, was suddenly summoned to another world by the Demon King who was poaching talents one day! Why was I poached when I was considered incompetent and demoted to a foreign country in modern times! ? "I have observed all your past work performances, and you have the value of becoming one of the Four Heavenly Kings!!" Uchimura was moved by the enthusiastic offensive and generous treatment from the Demon King and decided to switch to the Demon King's Army in another world, but! ? Without any external abilities, Uchimura can only use the knowledge and experience cultivated during his office worker period as a weapon, and he is about to challenge the business of the Demon King's Army! !