In a near-future where VRMMOs have been commercialized, the protagonist is playing a game when he is suddenly transported to a world that closely resembles the game. The game is a 'nation management strategy SLG' where human kings lead 'monster citizens.' Suddenly, the NPCs, who are monsters, gain self-awareness. They possess overwhelming combat power, capable of overcoming any threat in the other world. However, the protagonist, who is supposed to command them, is a 'weakest king' with no combat ability. This is a story of the weakest protagonist, who can't even defeat a goblin, becoming a dictator of a military superpower, leading the monsters, struggling, making mistakes, and sometimes rescuing young girls, as he survives in the other world. This is a tale of 'The Weakest King and the Invincible Army'—a story of the other world. ★ [Book Publication] has been decided!