That Time I Got Reincarnated as a Slime (Tensura) Season 3 episode 3 preview images are available on the official website. The episode is titled “Peaceful Days”. The synopsis describes how Rimuru's territory extends to the entire Jura Forest and because of this, he receives greetings from various monsters who call the forest their home. Rimuru then comes up with the idea of holding an opening festival for Tempest. Not only for diplomatic reasons but also to welcome new residents to the country.
The next episode, which is episode 51 of the Tensura anime, will air on Friday, April 19 at 23:00 JST. The series is currently available to stream on Crunchyroll, Netflix, and Muse Asia in select regions.
That Time I Got Reincarnated as a Slime (Tensei Shitara Suraimu Datta Ken), or Tensura for short, is a light novel series by Fuse with illustrations by Mitz Vah. Micro Magazine acquired the series in 2014 while Yen Press published an English version in 2017. A manga adaptation by Taiki Kawakami was also serialized in 2015 in Kodansha's Monthly Shonen Sirius magazine. An anime adaptation by Studio Eight-bit aired in October 2018 while a second season followed in January 2021. The Tensura franchise has received multiple spin-off manga titles, a spin-off anime, a mobile game and an animated film.
The third season of the anime is currently streaming and is expected to have a total of 24 episodes. Crunchyroll describes the plot:
Rimuru officially became the Demon Lord after defeating Clayman. After Walpurgis, the party of the Demon Lords, Rimuru's domain expanded to include the entire Great Forest of Jura. Anticipating a host of representatives from all races appearing to pay their respects, Rimuru decides to hold a festival to commemorate the opening day of Tempest, using it as an opportunity to get new citizen and introduce Demon Lord Rimuru to the world. Meanwhile, in the Holy Kingdom of Lubelius, the base of the monster-hating Luminism sect, Saint Knight Captain Hinata receives a message from Rimuru. But the message was actually a fabricated declaration of war sent by an unknown party. Upon learning that Hinata is heading towards Tempest, Rimuru makes a decision… Thus begins a new challenge for Rimuru, trying to differentiate friend from foe in pursuit of an ideal country where humans and monsters can prosper together.
Source: Official website©Taiki Kawakami, Fuse, KODANSHA/Project “Ten-Sura”