Tsumurin: Korokoro Yamu no Daibouken
English title: Tsumurin: Adventure of the Korokoro Mountain
Japanese title: つむりん　ころころやまのだいぼうけん
Type: ONA
Source: Original
Episodes: 2
Status: Finished Airing
Aired: Jul 16, 2020 to Sep 1, 2020
Duration: 5 min per ep
Rating: G - All Ages
Genres: Adventure

This is an animation in which the character Tsumurin rolls around. Let's Rolling Ball!

(Source: YouTube)