Season 3 of That Time I Got Reincarnated as a Slime anime, also known as TenSura, will premiere in the spring of 2024. In addition, a three-part original video adaptation will be released this fall.
The three-part OVA is titled Coleus’ Story and follows Rimuru and his squad while they visit the Coleus Kingdom. It is worth noting that said side story was first released in the Blu-Ray edition of the anime’s second season. The story is chronologically set between the first and second seasons of the anime.
As part of the franchise’s tenth anniversary, the series’ original creator Fuse has a new story to be serialized. Titled How to Spend a Certain Vacation, the story happens between the events of volumes 9 and 10 of the TenSura manga series. A stage performance based on the series will also happen in August this year. A visual for the anniversary is also out and the artists involved in the franchise took part to draw their own Rimurus:
That Time I Got Reincarnated as a Slime by Fuse and illustrated by Mitz Vah started out as a web novel series, which was first published in Shosetsuka ni Naro from 2013 to 2016 before being acquired by Micro Magazine. Under the new imprint, the light novel has been serialized since 2014. It was then licensed in English by Yen Press for North America in 2017.
A manga adaptation by Taiki Kawakami, and has been published in Kodansha’s Monthly Shonen Sirius since March 2015. Kodansha USA licensed the manga for an English release in October 2016. As of this writing, there are six manga spin-offs released, the most recent is That Time I Got Reincarnated as a Slime: Clayman’s Revenge, released on April 2022.
The series’ first season aired from October 2018 to March 2019, while the second season aired in two cours: the first part from January to March 2021 and the second part from July to September 2016. It also received a spin-off anime series based on the Slime Diaries manga, and aired from April to June 2021. Most recently, the movie That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond premiered in Japan on November 25, 2022 with Crunchyroll releasing internationally this 2023.
Source: Special Anniversary Site
© Taiki Kawakami, Fuse, Kodansha / Tensura Production Committee