Episode 1 | The Storm Dragon, Veldora

Mikami Satoru, a businessman, is stabbed by a criminal on the street and killed. When he regains consciousness in the darkness, he finds that he's been reincarnated as a slime.

Episode 2 | Meeting the Goblins

The slime Mikami and the Storm Dragon Veldora decide to give each other names. Veldora gives the slime Mikami the name "Rimuru," and Rimuru comes up with a family name for both of them: "Tempest." Then Rimuru uses his Predator ski...

Episode 3 | Battle at the Goblin Village

After leaving the cave, Rimuru encounters a village of Goblins under attack by a clan of Direwolves. Caught in the heat of the moment, Rimuru agrees to help the Goblins in their battle. That night, the Direwolves arrive to try to ...

Episode 4 | In the Kingdom of the Dwarves

Rimuru and his companions visit the Dwarven Kingdom, the Armed Nation of Dwargon, in search of some artisans to help the Goblins learn to supply their own food, shelter, and clothing. However, a skirmish just outside the city gate...

Episode 5 | Hero King, Gazel Dwargo

Thanks to Rimuru's skill, Kaijin was able to finish all the longswords and deliver them to the king, so the two of them celebrate by heading to a bar staffed by lots of elf girls. One of them reads Rimuru's fortune for fun, and se...

Episode 6 | Shizu

One day, in the midst of the improvements on the Goblin Village with the help of Kaijin and the dwarves, Rimuru meets a trio of adventurers from the Guild who've been temporarily joined by a masked woman named Shizu. Shizu turns o...

Episode 7 | Conqueror of Flames

The Demon Lord Leon Cromwell summoned Shizu out of Tokyo as it burned during in the air raids, then forced the high-ranked spirit Ifrit to possess her. After taking over Shizu's body, Ifrit begins to rampage.

Episode 8 | Inherited Will

When Shizu was still with Demon Lord Leon, it was a Hero who rescued her. That Hero was Shizu's inspiration to help as many people as she could for many years. She even worked as a teacher for children who'd come from other worlds...

Episode 9 | Attack of the Ogres

Rimuru and the Goblins' village is developing nicely. The Dwarves are building all kinds of houses and furniture, and the local Goblin Lords have appointed Rigurd as the Goblin King. As Rimuru watches everything come together, he ...

Episode 10 | The Orc Lord

Six Ogres are all that remain of their clan after an attack by an Orc army. They say that the Orcs were traveling with a mysterious majin who wore plate mail and a clown mask. Rimuru proposes that the Ogres join his ranks, and the...

Episode 11 | Gabiru Is Here!

Rimuru's village has gained Benimaru and the other five Ogres as its newest allies. Soon after, the Lizardman Gabiru visits the village, having heard rumors about it. Gabiru has been visiting Goblin villages throughout the Great F...

Episode 12 | The Gears Spin Out of Control

The Orc army, led by the Orc Lord, continues its conquest throughout the Great Forest of Jura. The crisis has spurred Treyni of the Dryads, the caretakers of the forest, to take action. She has had her eye on Rimuru after noticing...

Episode 13 | The Great Clash

Rimuru and his Goblin riders set out for the marshlands to finalize their alliance with the Lizardmen. On the way, they save a Lizardman who'd been attacked by the Orcs. The victim turns out to be Gabiru's younger sister, who reve...

Episode 14 | The One Who Devours All

The majin Gelmud makes his appearance at last. His true goal was to evolve the Orc Lord into the Orc Disaster, a Demon Lord, and have him reign over the Forest of Jura. Upon learning this, the Orc Lord takes action.

Episode 15 | The Jura Forest Alliance

Post-war arrangements following the battle with the Orcs have begun. At the meeting, Rimuru reveals that he made a promise with the Orc Disaster, Geld, to take all of the Orcs' sins upon himself. When the Ogres and Lizardmen hear ...

Episode 16 | Demon Lord Milim Attacks

The Jura Tempest Federation, with Rimuru as its leader, has formed an alliance with the Armed Nation of Dwargon. Just as Rimuru thinks there are only peaceful days ahead, he senses an enormous mass of magical power heading straigh...

Episode 17 | The Gathering

The Demon Lord Carrion has sent one of his Three Beastketeers, Phobio, on a raid of Rimuru's city. However, Phobio is quickly defeated when Milim meets his attack with her own. Rimuru and his subordinates then ask Phobio why he ha...

Episode 18 | Evil Creeps Closer

Phobio can't restrain his anger toward Milim. He finds himself faced with Footman and Tear, two masked members of the Moderate Harlequin Alliance, who suggest that he become a Demon Lord to take revenge on Milim. They tell him tha...

Episode 19 | Charybdis

Rimuru and his allies begin their battle against the calamity monster Charybdis. Armed with an army of whale monsters, Charybdis proves to be a powerful foe for the Jura Forest Alliance.

Episode 20 | Yuuki Kagurazaka

As the Jura Tempest Alliance celebrates its victory over Charybdis, Rimuru is melancholy over the promise he made to Shizu. As such, he decides to travel to the neighboring kingdom and find the students she used to train.

Episode 21 | Shizu-san's Students

Shizu's students do not have long to live because of the energy used to summon them. Rimuru is determined to save them from their fate and becomes their teacher to train them, much to their chagrin.

Episode 22 | Conquering the Labyrinth

Summoning superior might save the children, so Rimiru enters the Dwelling of Spirits. The Queen of Spirits is amused by Rimuru and decides to put him through a test.

Episode 23 | Saved Souls

In the heart of the labyrinth, Shizu's students pray to summon superior spirits. As Rimuru watches over, an overwhelming presence appears. Will Rimuru finally be able to fulfill his promise to Shizu?

Episode 24 | Black and Mask

Long ago, Shizu is called to the kingdom of Filtwood to stop a revived demon who poses a grave threat to the world. But as the adventurers are briefed, a mysterious being named Black appears who challenges Shizu to a fight.

Episode 25 | Veldora's Diary

Inside of Rimuru's stomach, the Storm Dragon Veldora and the Great Spirit Ifrit pass the time by playing a game of shogi while they recap everything that has happened since a strange slime appeared in their world.

Episode 26 | OVA 1: Hey! Butts!

Rimuru suddenly realizes that there's nothing to do for recreation in Tempest. He suggests sumo wrestling as a way for everyone to have fun together, and his friends are immediately on board with the idea.

Episode 27 | OVA 2: The Tragedy of M?

Rimuru gets tired of Shion and Shuna fighting over him all the time and decides to create beanbag-style replicas of himself filled with special sand from a nearby lake. Of course, rumor has it that a monster lives at the bottom.

Episode 28 | OVA 3: Rimuru's Glamorous Life as a Teacher, Part 1

Episode 29 | OVA 4: Rimuru's Glamorous Life as a Teacher, Part 2

Episode 30 | OVA 5: Rimuru's Glamorous Life as a Teacher, Part 3