That Time I Got Reincarnated as a Slime (Vol. 4)

That Time I Got Reincarnated as a Slime: The Ways of the Monster Nation Vol. 4 continues the thrilling expansion of Rimuru Tempest’s growing realm, Tempest. As Rimuru consolidates power and strengthens political ties, he must navigate the complex world of inter-species diplomacy and hidden threats lurking in the shadows.

With the Western nations watching closely, and unrest brewing among rival factions, Rimuru’s leadership is put to the ultimate test. Can Tempest remain a symbol of unity and coexistence, or will greed and suspicion tear it apart? This volume mixes political drama, character growth, and comedic moments with the world-building fans love.

Written by Sho Okagiri, based on the original work by Fuse, and featuring stunning illustrations by Mitz Vah, this spin-off dives deeper into the administrative and strategic challenges of building a nation from the ground up—while retaining the charm and humor of the beloved Slime franchise.

Main Themes of the Book

• Leadership and Governance: Rimuru juggles diplomacy, economic development, and political complexity in Tempest.
• Trust and Loyalty: Alliances are tested, and betrayal looms as trust becomes more valuable than strength.
• Unity in Diversity: The vision of coexistence between monsters and humans is challenged by prejudice and ambition.
• Strategy and Worldbuilding: Focuses on building a sustainable, functioning society through negotiation and policy.

Why you should read this manga 

• Offers a deeper, more strategic look into the world of That Time I Got Reincarnated as a Slime.
• Great for fans who enjoy political intrigue and high-stakes diplomacy in fantasy settings.
• Features familiar characters like Rimuru in a new light—as a ruler, negotiator, and protector.
• Combines action, humor, and tactical storytelling with vibrant art.
• Expands on the lore and geography of the Slime universe.

Volume 4 of The Ways of the Monster Nation enriches the Slime universe with thoughtful storytelling, layered politics, and meaningful character development. As Rimuru's dream of a peaceful monster nation grows, so too do the challenges he must face. This volume is perfect for fans seeking depth beyond the battlefield—and more slime-powered leadership brilliance.