That Time I Got Reincarnated as a Slime (Simuldub)

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!

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."

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.

Rimuru and his companions visit 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 lands Rimuru and Gobta in a prison cell.

Thanks to Rimuru's skill, Kaijin was able to make and deliver all of the longswords, so they celebrate by going to a bar staffed by elf girls. One of them reads Rimuru's fortune, and sees an image of someone she believes Rimuru is destined to be with.

One day, while working on the improvements to the Goblin Village, Rimuru meets a trio of adventurers and a masked woman named Shizu. Shizu turns out to be the person Rimuru is destined to be with, according to his fortune.

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

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.

Rimuru and the Goblins' village is developing nicely. The Dwarves are building houses and furniture, and the local Goblin Lords have appointed Rigurd as the Goblin King. As Rimuru watches everything come together, he decides to test his new skills.

Rimuru convinces the ogres to join him in a temporary alliance to defeat the orcs.

Gabiru arrives at the village in an attempt to unite everyone to fight the orcs, but he is quickly defeated and is forced to retreat.

Treyni reveals the true goal of the Orcs, and explains that all serving under the Orc Lord are affected by the unique skill, "Starved." Rimuru resolves to defeat the Orcs and the Demon Lord.