A thirty-seven-year-old office worker is stabbed to death and wakes up in a fantasy world as a slime. Naming himself Rimuru Tempest, he absorbs the abilities of the monsters around him and gradually turns a scattered goblin village into a nation — a story as interested in diplomacy and infrastructure as it is in fighting.
Plus 1 optional extra and 2 more titles.
7 titles · 104 episodes · ~41.5 hours
Follow the numbered seasons in order, with the five OADs and Visions of Coleus slotted in between Seasons 1 and 2 where they belong. The two films and the slice-of-life spin-off sit outside the main plot.
Start here. Rimuru arrives in the world, befriends a sealed dragon, and starts pulling nearby monster tribes into something that will eventually become a country. Everything in the franchise rests on this season.
Five episodes covering the Ingrassia arc, in which Rimuru takes over a class at a magic academy to keep a promise made in Season 1. Despite being released as bonus episodes, these adapt source material that Season 2 assumes you already know. The first two lean comedic; the last three carry the arc.
Three episodes set immediately after Rimuru's teaching stint ends. Working undercover under his old human name, he walks into a succession crisis in the Kingdom of Coleus. Written by the original author and set between Seasons 1 and 2, not after Season 2 as the release date suggests.
The tone shifts hard here. Tempest faces its first real attack from outside, and the consequences push Rimuru into decisions the earlier seasons never asked of him.
One continuous story with the previous entry — the split was a broadcast decision, not a story break. Watch straight through.
Rimuru's nation starts operating as a state on the world stage, and the story leans further into politics and alliances. Twenty-four episodes across two cours.
Currently airing. Rimuru pushes toward a formal alliance between humans and monsters while the Rozzo family moves against him. Watch everything above first — this season assumes all of it.
⚠ Season 4 is planned as five cours in total, making it the longest run in the franchise. The 24 episodes listed here are the first two cours, airing back to back from April 3 to September 25, 2026. The remaining three cours have no announced dates.
A twelve-episode slice-of-life spin-off set partway through Season 1, back when Tempest was still a village. No stakes, no plot advancement — just Rimuru and the cast dealing with harvests, festivals and hot springs. Adapted from a separate manga rather than the main source material.
An anime-original film set after Season 2, supervised by the original author but not adapting any part of the source material. Rimuru meets a girl carrying a curse tied to a kingdom's history. It stands alone and skipping it changes nothing in the main story.
The second film, set a month after the founding festival that closes Season 3. Rimuru and his companions take a holiday at an elven resort island and run into a theft that pulls them into an underwater kingdom's affairs. Another anime-original story — watch it after Season 3, or skip it.
The numbered seasons run in a straight line — Season 1 through Season 4, which is currently airing — and each one picks up directly from the last. Season 2 was split into two cours when it aired, but it tells one continuous story, so watch both parts back to back.
The part people get wrong is the OADs. They look like disposable bonus episodes, but they adapt the Ingrassia arc from the source material, in which Rimuru takes over a class at a magic academy and keeps a promise made in Season 1. Season 2 treats those events as something you already know about. Visions of Coleus covers the same period, picking up right after Rimuru's teaching stint ends. Both belong between Seasons 1 and 2, and that is where they are placed here.
The two films are anime-original stories rather than adaptations of the source material, so neither is required to follow the main plot. The Slime Diaries is a slice-of-life spin-off set partway through Season 1, and it drops the stakes entirely in favour of everyday comedy. All three are listed below the divider.
That Time I Got Reincarnated as a Slime has 5 seasons and 2 other entries in the main run — 104 episodes altogether.
| Title | Type | Episodes | Aired |
|---|---|---|---|
| That Time I Got Reincarnated as a Slime | TV Series | 24 episodes | October 2018 |
| That Time I Got Reincarnated as a Slime OAD | OVA | 5 episodes | July 2019 |
| That Time I Got Reincarnated as a Slime: Visions of Coleus | OVA | 3 episodes | November 2023 |
| That Time I Got Reincarnated as a Slime Season 2 | TV Series | 12 episodes | January 2021 |
| That Time I Got Reincarnated as a Slime Season 2 Part 2 | TV Series | 12 episodes | July 2021 |
| That Time I Got Reincarnated as a Slime Season 3 | TV Series | 24 episodes | April 2024 |
| That Time I Got Reincarnated as a Slime Season 4 | TV Series | 24 episodes | April 2026 |
| Title | Type | Episodes | Aired |
|---|---|---|---|
| The Slime Diaries | TV Series | 12 episodes | April 2021 |
| That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond | Movie | November 2022 | |
| That Time I Got Reincarnated as a Slime the Movie: Tears of the Azure Sea | Movie | February 2026 |
7 titles · 104 episodes · ~41.5 hours
Only spin-offs that tie into the main story are listed here — anthologies, fan books and the like are left out.
The light novel finished at twenty-three volumes on November 29, 2025, so the source material is complete while the anime is still adapting it. English volumes are published by Yen Press. Note that volume numbers for the manga adaptation by Taiki Kawakami run differently from the light novel — that series is still ongoing and is published in English by Kodansha USA, so check which one a recommendation refers to before buying.
Season 1, from episode 1. There is no shortcut in — the series builds a nation from nothing across twenty-four episodes, and every season after that assumes you watched it happen.
Season 1, then the five OADs, then Visions of Coleus, then Season 2 and Season 2 Part 2, then Season 3, then Season 4. The OADs and Visions of Coleus came out years apart but both cover the same stretch between Seasons 1 and 2, so they go there rather than at the end.
Yes, more than their packaging suggests. They adapt the Ingrassia arc, where Rimuru teaches a class at a magic academy and keeps a promise from Season 1. Season 2 treats those events as something you already know. The first two are lighter comedy episodes; the last three carry the arc.
Between Seasons 1 and 2, right after the OADs. It was released in 2023, long after Season 2 aired, which leads a lot of guides to place it afterwards — but the story picks up directly from the end of Rimuru's time as a teacher, so it belongs in the earlier gap.
Yes. It is a twelve-episode slice-of-life spin-off adapted from a separate manga, set partway through Season 1 when Tempest was still a village. Nothing in it affects the main plot. Watch it if you want more time with the cast in a quieter mood.
No. Scarlet Bond and Tears of the Azure Sea are both anime-original stories rather than adaptations of the source material, and neither is referenced by later seasons. Scarlet Bond is set after Season 2; Tears of the Azure Sea a month after the festival that closes Season 3.
Yes. Season 2 was broadcast as two cours six months apart, but the story runs straight through with no break. Treat it as one twenty-four-episode season.
A recap special numbered as episode 24.5, in which Veldora and Ifrit summarise the events of Season 1 over a game of shogi. It adds no new story and is skippable if you are watching straight through. Crunchyroll lists it under Season 1.
The main list runs to 104 episodes, or roughly forty-one and a half hours. That covers Seasons 1 through 4 plus the OADs and Visions of Coleus, counting only the first two cours of Season 4 since the rest has not aired. Adding The Slime Diaries and the two films brings the total to around forty-nine hours.
Crunchyroll carries everything — all four seasons, the OADs, Visions of Coleus and The Slime Diaries — in both subtitled and dubbed form. Tears of the Azure Sea had a theatrical run rather than a streaming release; its home video release was scheduled for late 2026. Availability varies by region.
Yes, for every season and for the side content. The dub started under Funimation and moved to Crunchyroll, and Brittney Karbowski has voiced Rimuru throughout, so the lead is consistent from Season 1 to Season 4. A handful of supporting roles were recast along the way. The Season 4 dub began on April 17, 2026, two weeks behind the subtitled episodes.
Almost none. The anime follows its source material closely, with only a couple of episodes in Season 1 containing original material, and even those stay within the story rather than padding it. The OADs and Visions of Coleus, despite being side releases, are adaptations rather than filler.
The anime is not finished. Season 4 is planned as five cours in total — the first two run from April 3 to September 25, 2026, and the remaining three have no announced dates. The source material has finished: the light novel series concluded with its twenty-third volume on November 29, 2025, so the anime still has a substantial amount left to adapt.
None of them are part of the watch order. Ramiris to the Rescue was a two-episode, three-minute promotional short released on a model kit maker's YouTube channel in 2022 for a limited window, and it is no longer available through any official route. The various chibi shorts posted to the franchise's social accounts are gag sketches with no connection to the story.
