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S00E01 Aired March 26, 2019

Tales: Veldora's Journal

After being taken into Rimuru's body, Ifrit awakens to find the Storm Dragon Veldora standing before him. Veldora calls Ifrit to where he is, delighted to find a new conversation partner. Thus the two of them begin to watch over Rimuru's actions from within him and recaps events of the season while in a discussion with Veldora as they play Shogi.

S00E02 Aired July 09, 2019

The Tragedy of M?

One day, when Shuna and Shion are fighting over Rimuru's squishy slime body as usual, Rimuru comes up with the idea to make a cushion in the shape of his slime form. He travels around Tempest to see if his friends know of any good materials he can use, and he learns that a special type of sand found along a lake shore in the forest is exactly what he's looking for. So he sets out to collect some sand... but a monster is waiting for him by the lake!

S00E03 Aired December 04, 2019

Hey! Butts!

Being physically incapable of sleeping, Rimuru takes an experimental sleeping pill Vesta invented, and dreams about his attempt to make Sumo Wrestling Tempest's national sport.

S00E04 Aired March 07, 2020

Extra: Rimuru's Glamorous Life as a Teacher, Part 1

Rimuru, who is teaching Shizu's students as a substitute at the Kingdom of Ingrassia's Freedom Academy, takes part in an orientation in actual field combat in the school's annual outdoor training event. Transfixed by the prize he gets if he wins, he accepts a challenge by the teacher Jeff. However, an enemy appears before the students...

S00E05 Aired July 09, 2020

Extra: Rimuru's Glamorous Life as a Teacher, Part 2

Rimuru, now a teacher at the Freedom Academy in the Kingdom of Ingrassia, has become involved in the school's outdoor training event with his class. The outdoor training event is an annual competition in which the students of each class guard the teachers on a journey to a nearby town. Rimuru is assigned to Class A, while his own students in Class S escort the young Tiss-sensei. All the students are eager to show how much their daily training has paid off, but the situation turns around when they're attacked by thieves!

S00E06 Aired November 27, 2020

Extra: Rimuru's Glamorous Life as a Teacher, Part 3

Rimuru and the Class S students have made it through the first exercise of the Freedom Academy's annual outdoor training event. Class S has arrived first at the destination, the mansion of Count Guratol, and now they're ready to begin the second exercise, a cave exploration... but awaiting them there are thieves who hope to kidnap the students and make a fortune returning them for ransom money. Just when it seems like Rimuru's students have fought them off thanks to the skills he taught them, they realize a monster is lurking among the thieves!

S00E07 Aired January 05, 2021

Digression: Hinata Sakaguchi

A merchant from the east brings Hinata Sakaguchi a new book. In it she finds surprising information about the Jura Tempest Federation, a nation of monsters. As a former student of Shizu's, what goes through Hinata's mind upon learning about the existence of Rimuru? This special episode gives some hints as to what's coming in the new arc, as well as a look back at Rimuru's exploits thus far.

S00E08 Aired June 29, 2021

Tales: Veldora's Journal 2

The deadly encounter with Hinata, the attack from the Kingdom of Falmuth, and the newly born Demon Lord... Veldora and Ifrit have been watching these events unfold from within Rimuru's Stomach. Two years have passed since Rimuru and Veldora first met in the cave, and their promise is about to be fulfilled. The two of them leisurely look back on the past years of Tempest, and are frightened by "something".

S00E09 Aired November 25, 2022

Coleus' Dream, part 1

The story centers on a new country named Raja, located to the west of Tempest. Rimuru and his companions get involved in a long-running conspiracy that swirls around a girl with a mysterious power. Rimuru and his commander Benimaru also encounter another ogre survivor named Hiiro, who used to hold Benimaru in high regard. An incredible adventure packed with new characters begins. The power of bonds will be put to the test!

S00E10 Aired November 01, 2023

Coleus' Dream, part 2

Yuuki asks Rimuru to investigate the Kingdom of Coleus, where a battle for succession has pitted the kingdom's two princes against each other. Rimuru launches a covert operation to sneak into Coleus and find out what's driving this conflict.

S00E11 Aired November 01, 2023

Coleus' Dream, part 3

Aslan visits Rimuru to thank him for saving his sister, Zenobia. They discuss her illness and Souther's behavior, and begin to suspect that the court physician, Gustav, is behind both. Rimuru dons yet another disguise to investigate further.

S00E12 Aired November 01, 2023

Visions of Coleus: Purple and Roses

Rimuru confirms that it was Gustav who cursed Zenobia with illness. It turns out he and his accomplice, Carl, are Archdemons plotting to manifest their god using Zenobia as a vessel. Can Rimuru stop them before the Kingdom of Coleus is lost?

S00E13 Aired March 30, 2024

Digression: Diablo's Journal

After defeating Clayman at Walpurgis, Rimuru officially became a Demon Lord and a member of Octagram. Meanwhile Diablo awaits Rimuru's return in Tempest, and is anxious to learn about his master's activities as soon as possible. A look back at Walpurgis.

S00E14 Aired August 10, 2024

Digression: Luminus Memories

Although Luminus and Hinata are deeply important to each other, they ended up in a fierce fight. What happened behind the scenes of that tangled mess? Luminus, the one god of Lubelius and a member of Octagram, tells the story from her point of view.

S00E15 Aired August 10, 2024

Digression: Luminus Memories

Although Luminus and Hinata are deeply important to each other, they ended up in a fierce fight. What happened behind the scenes of that tangled mess? Luminus, the one god of Lubelius and a member of Octagram, tells the story from her point of view.