That Time I Got Reincarnated as a Slime: Season 4

As Shuna searches for Rimuru, the latter observes Tempest and sees how monsters and humans have been getting along. He has also made plans to build a train station for the new train and a bar with female elves on the Dungeon’s 95th floor. However, Rimuru also learns that the Dungeon has been having issues. Meanwhile, Hinata teaches class in Tempest, with Class S being among them, but when she catches Rimuru in the classroom, she throws him out. After Shuna finds Rimuru, she gives him a new type

Team Lightspeed try out the Dungeon again. After clearing the 30th floor, Masayuki's fame rises. Rimuru, Masayuki, Ramiris, Grad and Veldora are pleased to see how the Dungeon is functioning. They also learn that another group called Team Green Fury is clearing the Dungeon quickly. Ramiris and Veldora are paid for their hard work. Also, merchants from the Western Nations are visiting Tempest. Private research labs for Rimuru and Ramiris are built in the Dungeon. Shion and Shuna visit Rimuru duri

In the Kingdom of Seltrozzo, Mariabel recalls her past as a corrupt noble from Earth, having died from old age. After being reborn in the Central World, she was given a special unique skill called Greed, which allows her to manipulate greed in others, though she doesn't use this power on Granville though. The two plan to bring peace to the world by conquering it. Back in Tempest, following issues with handling their avatars, Rimuru and his friends go to see Kurobe for new gear. They start traini

Rimuru and his friends continue to take on adventurers in the Dungeon using their avatars, which is attracting more challengers. Rimuru then gets a visitor: Frey, which makes Milim nervous since Frey is aware that she is still neglecting her duties. After Frey leaves with Milim, Shuna is also aware of Rimuru was doing this whole time. Grad arrives with a letter from the Council of the West, leading Rimuru to suspect that Team Green Fury were scouts sent by the Council. Meanwhile, Mariabel resume

Tiss 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 (the same ones that Rimuru encountered earlier) 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 th

As the spirit of Shizu enters the village, the Bon Festival is announced, a festival to connect with your own kin and ancestors. Many townsfolk reminisce about the past. A number of changes that the Kijin have undergone after their evolution are highlighted. Shizu is embarrassed by both people's memories of her, and the outfits worn by Rimuru in the human form that resembles her.

Milim writes her own diary entry. After enjoying some food with Rimuru and the Kijin, she runs into Ranga and Gobta in town before returning for more snacks. To learn about the simple pleasantries in life, she watches Geld do construction work. In the evening, she rests while being carried on Rimuru's back, who has to repair the damage Milim's caused with her reckless behavior.

Autumn arrives, and the citizens, supervised by Ririna, work together to harvest the crops planted in spring. Shion and Milim have potato-harvesting contests, while Treyni shows great fondness for the tubers, revealing she was born from a potato. The harvesters all enjoy their roasted sweet potatoes and gathered fruit. Treyni makes off with a supply of potatoes, planning to fry them and serve them at her bar.

Winter is around the corner, so as the temperature drops, Milim finds enjoyment in resting under a kotatsu. Shuna prepares for winter by handing out personalised clothes to Rimuru and Benimaru. A delegation from Blumund makes their way to Rimuru City meeting Youm's party along the way, but they are mostly interested in Tempest's meat and potato chips. Youm tries to get used to the differences between monsters and humans.

Tempest sees its first snow, and a team is assembled to shovel the city's streets. After a snowball fight, Milim builds a Kamakura shaped like Rimuru where they eat sweets with some of the town's children. To warm up, Rimuru enjoys a hot spring bath built by Souei, accompanied by Shion, Shuna, Milim and Eren.

Rimuru introduces Santa Claus to Tempest and has the dwarves help him set up a Christmas festival, complete with a tree and Santa outfits. Together with Milim, they get to enjoy a fancy Christmas dinner. Eren performs a Christmas song on stage with the children's choir. At the gift exchange, Rimuru is the intended recipient for many of the city's presents.

Festivities are held around the Japanese New Year. Rimuru performs an act of worship at the first shrine visit before learning that Rimuru is himself the deity revered at the shrine. A body double is left at the shrine to greet the line of visitors. Geld, Kurobe and three Hobgoblins form a team to make mochi, while Shion can barely enjoy dinner with the Kijin after losing to Milim in badminton and having her face inked black as punishment.