by The official website for That Time I Got Reincarnated as a Slime Season 4 has released the synopsis and preview stills for Episode 88, titled “Gran, the Hero of Dawn.” The upcoming episode continues the story following Rimuru Tempest’s arrival in the Holy Empire of Ruberios, where a peaceful cultural event may soon lead to important political discussions.
As Season 4 continues its multi-cour broadcast, fans are eagerly anticipating the next chapter in Rimuru’s journey, which blends diplomacy, world-building, and fantasy adventure.
Episode 88: “Gran, the Hero of Dawn”
According to the newly released synopsis, Rimuru Tempest and his companions arrive in Ruberios to participate in a music exchange festival organized by Demon Lord Luminous Valentine.
The festival serves as a symbol of friendship and cooperation between nations, highlighting Rimuru’s ongoing efforts to strengthen diplomatic ties rather than relying solely on military power.
After receiving a warm welcome from the people of Ruberios, Rimuru spends the evening enjoying the celebrations.
However, the peaceful atmosphere takes an intriguing turn when Luminous personally invites Rimuru to a private conversation later that night.
While the synopsis does not reveal the details of their discussion, the meeting is expected to play an important role in shaping future political developments within the series.
What to Expect from Episode 88
Episode 88 is likely to focus on:
- Rimuru’s diplomatic relationship with the Holy Empire of Ruberios.
- The music exchange festival and its role in strengthening international cooperation.
- A private meeting between Rimuru and Demon Lord Luminous.
- New political developments that may influence future story arcs.
- Additional world-building and interactions between major characters.
Rather than emphasizing large-scale battles, the episode appears to continue the series’ tradition of balancing action with diplomacy, culture, and character development.
About That Time I Got Reincarnated as a Slime
Based on the popular light novel series written by Fuse and illustrated by Mitz Vah, That Time I Got Reincarnated as a Slime—often shortened to TenSura—is one of the most successful isekai franchises of the past decade.
The story follows Satoru Mikami, an ordinary office worker who is reincarnated into a fantasy world as a slime after losing his life in modern Japan.
Although he begins as one of the weakest creatures imaginable, he gains the powerful ability known as Predator, allowing him to absorb other beings and acquire their abilities.
After taking the name Rimuru Tempest, he builds the Jura Tempest Federation, a nation where humans, monsters, and other races can coexist peacefully.
The series combines fantasy adventure, kingdom-building, political strategy, and emotional character development, making it one of the defining titles of the modern isekai genre.
A Franchise That Continues to Grow
Since its anime debut in 2018, That Time I Got Reincarnated as a Slime has expanded into one of Japan’s biggest multimedia franchises.
Major milestones include:
- Season 1 (2018–2019)
- Season 2 (2021), broadcast across two split cours
- The Slime Diaries, a slice-of-life spin-off anime
- That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond (released in 2022), which attracted more than 1 million moviegoers in Japan and earned approximately ¥1.4 billion at the domestic box office
- Coleus’ Dream, a three-episode original animation released in 2023 as part of the franchise’s 10th Anniversary Project
- TenSura 10th Live, the franchise’s first large-scale anniversary event
- Season 3, which aired from April to September 2024
- That Time I Got Reincarnated as a Slime the Movie: Tears of the Azure Sea, released in Japanese theaters on February 27, 2026
The continued success of the anime, movies, novels, manga, and spin-offs has helped establish TenSura as one of the most recognizable fantasy anime series worldwide.
Season 4 Broadcast Information
That Time I Got Reincarnated as a Slime Season 4 premiered on April 3, 2026, and is being broadcast over five split cours, making it the franchise’s longest television project to date.
The first two cours are currently airing on:
- Nippon TV Network stations
- BS11
- Additional streaming platforms
The extended broadcast schedule allows the anime to adapt more of the original light novel while giving viewers additional time to explore the expanding world of Tempest and its neighboring nations.
Why Episode 88 Is Important
Although Episode 88 appears relatively calm compared to recent action-heavy storylines, it may prove to be one of the season’s most important political episodes.
The meeting between Rimuru and Luminous could influence future alliances, diplomatic relations, and strategic decisions involving the Holy Empire of Ruberios.
Longtime fans know that seemingly peaceful conversations in TenSura often lay the groundwork for major events later in the story.
At the same time, the music exchange festival reflects one of Rimuru’s core ideals—building peace through mutual understanding rather than conflict.
Looking Ahead
With the release of Episode 88’s preview and new still images, anticipation continues to grow for the next chapter of That Time I Got Reincarnated as a Slime Season 4.
As Rimuru enjoys the festivities in Ruberios before meeting Demon Lord Luminous in private, viewers can expect another episode filled with thoughtful world-building, meaningful character interactions, and hints about the challenges still to come.
Whether you’re a longtime TenSura fan or a newcomer to the series, Episode 88 promises to deliver another engaging blend of fantasy, diplomacy, and adventure as Rimuru continues expanding his vision of a peaceful world.
