
One day, Shuna and Shion are fighting over Rimuru's squishy slime body as usual. Rimuru figures that giving them each a body double of himself would solve the conflict, but when he imagines some of his other friends asking him to do the same for them, he quickly drops that plan. Then he 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 alon...
Each episode was bundled with special editions of manga volumes 12 through 16, respectively.
Rimuru’s quest for a slime‑shaped cushion turns a lakeside sand hunt into a chaotic, monster‑filled comedy.
When the ever‑energetic Shuna and Shion start squabbling over Rimuru’s gelatinous form, the slime‑king decides a diplomatic solution is in order. His first idea—handing each a perfect body double—quickly fizzles as the request list balloons, prompting him to think smaller. Instead, Rimuru hatches a plan to craft a plush cushion that mimics his own slime shape, a portable peace offering that can be tossed around without causing a full‑blown identity crisis. To pull off this soft‑serve stunt, Rimuru hits the streets of Tempest, hunting for the perfect material. A rumor leads him to a secluded lake where a rare, glittering sand lines the forest’s edge—exactly the texture he needs for a resilient yet squishy pillow. He sets out with optimism, only to find a hulking monster guarding the shoreline, turning a simple scavenger hunt into a slap‑stick showdown. Meanwhile, the ever‑impulsive dragon‑girl Milim catches wind of the “picnic” and swoops down from the skies, adding her own brand of chaotic enthusiasm to the mix. The OVA blends rapid‑fire comedy with light‑hearted action, showcasing Rimuru’s inventive problem‑solving while delivering the series’ signature blend of friendship, absurdity, and a dash of monster‑bashing.
This five-episode OVA is a lighthearted side story focused on Rimuru crafting a slime-shaped cushion and picnicking with friends. Expect low-stakes fantasy action, slapstick comedy, and mild fan service consistent with the main series' TV-14 tone.
That Time I Got Reincarnated as a Slime OAD has 5 episodes.
That Time I Got Reincarnated as a Slime OAD is currently finished airing.
That Time I Got Reincarnated as a Slime OAD was produced by 8bit.
That Time I Got Reincarnated as a Slime OAD aired Jul 9, 2019 to Nov 27, 2020.
That Time I Got Reincarnated as a Slime OAD is based on a Manga.
This five-episode OVA is a lighthearted side story focused on Rimuru crafting a slime-shaped cushion and picnicking with friends. Expect low-stakes fantasy action, slapstick comedy, and mild fan service consistent with the main series' TV-14 tone.

Tempest, Rimuru
Main
CV: Okasaki, Miho

Aubert, Chloe
Supporting
CV: Tadokoro, Azusa

Benimaru
Supporting
CV: Furukawa, Makoto

Daikenja
Supporting
CV: Toyoguchi, Megumi

Diablo
Supporting
CV: Sakurai, Takahiro

Gabiru
Supporting
CV: Fukushima, Jun

Garm
Supporting
CV: Souma, Kouichi

Geld
Supporting
CV: Yamaguchi, Tarou

Gesdar
Supporting

Gibson, Gale
Supporting
CV: Satou, Gen

Gobta
Supporting
CV: Tomari, Asuna

Hakurou
Supporting
CV: Ootsuka, Houchuu

Izawa, Shizue
Supporting
CV: Hanamori, Yumiri

Kaijin
Supporting
CV: Ono, Atsushi

Kurobee
Supporting
CV: Yanagita, Junichi

Misaki, Kenya
Supporting
CV: Asai, Ayaka

Myrd
Supporting

Nava, Milim
Supporting
CV: Hidaka, Rina

Oloy
Supporting
CV: Hasegawa, Ikumi

Ranga
Supporting
CV: Kobayashi, Chikahiro

Rigur
Supporting
CV: Ishiya, Haruki

Rigurd
Supporting
CV: Yamamoto, Kanehira

Rondo, Alice
Supporting
CV: Shiraishi, Haruka

Segal, Jeff
Supporting
CV: Kinoshita, Hiroyuki
5 episodes
Ranked higher than 89% of all anime on AniTome (out of 19,551)
More popular than 95% of all anime