Isekai Quartet Season 3 has officially premiered, with its ninth episode released on December 8, 2025. This highly anticipated crossover anime continues to bring together beloved characters from various Isekai franchises, including Overlord, KONOSUBA, Re:Zero – Starting Life in Another World, The Saga of Tanya the Evil, The Rising of the Shield Hero, and The Eminence in Shadow.
When and Where Did Episode 9 Release?
Isekai Quartet Season 3 debuted on October 13, 2025, in Japan, airing on Tokyo MX and simultaneously streaming on the d Anime Store platform. International streaming began shortly thereafter, with Crunchyroll providing simulcasts. Episode 9 of the season became available on December 8, 2025. The English dub for Isekai Quartet 3 also began streaming on Crunchyroll starting October 27, 2025.
What Happens in Episode 9?
Episode 9 of Isekai Quartet 3 delves into a pivotal moment for the ensemble cast as they contemplate their potential return to their original worlds. The plot revolves around a music festival, with the prize rumored to be a button similar to the one that transported them to the school setting.
The episode explores the varying desires of the characters regarding going back home. Tanya, for instance, acknowledges that while they objectively lead better lives in the school world, she feels a responsibility to return to her war-torn reality. Similarly, Darkness and Megumin from the KONOSUBA series feel compelled to complete their quest to defeat the Demon King. In contrast, Kazuma and Aqua express contentment with their current, less problematic existence in the school world, noting only the lack of certain indulgences like alcohol.
A significant focus of the episode is on Subaru from Re:Zero. The school world offers him a reprieve from the immense pain and suffering he regularly experiences in his own reality. He was transported at a moment of genuine happiness, preceding traumatic events involving Rem and Puck. The episode highlights Subaru’s deep-seated determination to return home and continue his goal of making Emilia king, despite the hardships awaiting him. His memories are shown to be more profoundly affected by the events of his world compared to others, to the point where even he realizes the inconsistencies. Furthermore, even in the school world, Satella’s influence can still reach Subaru, causing his heart to be crushed if he attempts to speak about “Return by Death”.
This episode provides a blend of the series’ signature lighthearted humor with surprisingly deep character introspection, exploring the core mystery of the crossover and the characters’ true desires for their future.
