The Hero arc is about to intensify. The second cour of the fourth season of That Time I Got Reincarnated as a Slime arrives on July 3, 2026, accompanied by a new key visual, a second trailer, and the musical themes for this story stage. The message is clear: the Primordial Devils are about to make their full debut.

The new opening “TACTIC” is performed by Daoko, produced by Giga and TeddyLoid. The ending “Hymnal” is by Azusa Tadokoro, who also voices Chloe in the series, adding another layer of connection between performer and character. Both themes appear in the new trailer.

The second key visual features Rimuru alongside the Primordial Devils Testarossa, Ultima, and Carrera, who will finally make their large-scale debut in the anime. In the foreground appear Chloe and Granville with a mysterious figure resembling Chloe, a detail already sparking questions about the Hero arc’s direction in this season’s second half.

About That Time I Got Reincarnated as a Slime

That Time I Got Reincarnated as a Slime began as a web novel on Shosetsuka ni Naro and grew into one of the biggest isekai franchises, with light novels and manga exceeding 62 million copies in circulation. The first anime season premiered in 2018, followed by the second in 2021, the third in 2024, and multiple theatrical films. The fourth season is divided into five cours, and this second cour continues following Rimuru, the former office worker reincarnated as a slime, who builds a nation for harmonious coexistence of all races while facing increasingly powerful conflicts and enemies drawn to his leadership.

Do the Primordial Devils’ appearance heighten your expectations for this second cour, or is it the Hero arc that truly has your attention?