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.
Synonyms: Eiga no Osomatsu-san: Gekijou Koukai Kinen - Original Tanpen Gekijou, Mr. Osomatsu the Movie: Gekijou Koukai Kinen - Original Tanpen Gekijou, えいがのおそ松さん 劇場公開記念 オリジナル短編劇場
Status: Finished Airing
Country: Japanese
Released: 2019
Season: ONA
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