Osomatsu-san Movie: Gekijou Koukai Kinen - Original Tanpen Gekijou
Genres: Comedy
Type: ONA, Episodes: 7
Aired: Mar 1, 2019 to Mar 15, 2019
Studio: Pierrot
Source: Manga
Rating: R - 17+ (violence & profanity)
Synopsis:
A short series depicting side stories about the brothers' daily life, released on dTV streaming service.

It received an advance screening together with the movie on March 7 in Tokyo.

(Source: AniDB)