Osomatsu-san Movie: Gekijou Koukai Kinen - Original Tanpen Gekijou
Japanese title: えいがのおそ松さん 劇場公開記念 オリジナル短編劇場
Type: ONA
Episodes: 7
Source: Manga
Genres: Comedy
Studios: Pierrot
Duration: 2 min per ep
Rating: R - 17+ (violence & profanity)

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)