That Time I Got Reincarnated as a Slime is a fantasy isekai manga set in a vast magical world where monsters, magic, and kingdoms shape the balance of power, following Rimuru Tempest, a former human who is reincarnated as a slime with unique abilities that allow him to absorb powers, evolve rapidly, and reshape the world around him, leading him to build alliances, create a powerful nation, and influence the fate of multiple races while facing growing threats from powerful enemies and political forces, as his journey evolves from simple survival into large-scale conflicts, diplomacy, and the creation of a new world order, in what is widely known as Tensura manga, 転生したらスライムだった件 (Tensei Shitara Slime Datta Ken), Rimuru Tempest story, slime isekai saga, monster nation series, and fantasy world-building narrative blending action, strategy, and character growth into a highly engaging and immersive experience designed to attract fans of isekai and progression-based storytelling.

🏷️ Alternative Titles

Tensura Manga

That Time I Got Reincarnated as a Slime

転生したらスライムだった件 (Tensei Shitara Slime Datta Ken)

Rimuru Tempest Story

Slime Isekai Saga

Monster Nation Series