The Great Miscalculation of the Reincarnated Demon King: The Shortest Route to World Domination by a Competent Demon King's Army (Associated Names)

He doesn’t want to win, yet he does all the time! The talented Demon King’s army is on a winning streak! The most powerful Demon King of all time, Kengo, has a secret that he can never reveal. [The situation is worse than it was before his reincarnation!] In his previous life, he was Kengo…