

A long-running conspiracy is swirling over a mysterious power wielded by the Queen in Raja, a small country west of Tempest. When a slime who evolved into a Demon Lord named Rimuru Tempest crosses paths with Hiiro, a survivor of the Ogre race, an incredible adventure packed with new characters begins. The power of bonds will be put to the test!
Visual Effects
Rimuru's slime transformations still slap
Acting
Miho Okasaki's slime noises deserve an award
Writing
Actually gives Hiiro a real arc, rare for movie-only characters
Director
Yasuhito Kikuchi
Trivia, insights & behind the scenes
This was the first feature-length film in the franchise, released after season 2 part 2 but set ambiguously in the timeline—basically anime movie canon gymnastics.
The 'scarlet bond' concept draws heavily on Japanese notions of 'en' (縁), the invisible thread connecting fated relationships—fitting for a series literally about building a multi-species nation through personal connections.
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