Tensei Shitara Slime Datta Ken: Guren no Kizuna-hen

In this exclusive one-shot prequel to the film, Rimuru's world expands as a new threat emerges from a forgotten past. The story follows a mysterious encounter that sets the stage for the fiery bonds tested in the movie. Released as a limited Volume 0, only 800,000 copies were distributed to theatergoers.