That Time I Got Reincarnated as a Slime Specials Episode 3 Extra: Hey! Butts! 2019
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Being physically incapable of sleeping, Rimuru takes an experimental sleeping pill Vesta invented, and dreams about his attempt to make Sumo Wrestling Tempest's national sport.
- Released: 2019-12-04
- Runtime: 24 minutes
- Genre: Action & Adventure, Animation, Sci-Fi & Fantasy, Comedy
- Stars: Miho Okasaki, Megumi Toyoguchi, Tomoaki Maeno, Makoto Furukawa, Sayaka Senbongi
- Director: Fuse
