July 9, 2019 JST
Tensei Shitara Slime Datta Ken OVA (That Time I Got Reincarnated as a Slime OVA)
Dec 3 at 3:00pm UTC
Unaired episodes bundled with the 12th and 13th manga volumes of the manga adaptation of the novels.
The first episode will be about the Sumo competition that held at Tempest for the first time, suggested by Rimuru.