The Mr. Osomatsu anime series premiered in October 2015, and Crunchyroll streamed the series as it aired in Japan.
The “Osomatsu-san Ouma de Kobanashi” (Mr. Osomatsu: A Horse Anecdote) anime special that aired on Tuesday morning had an end card with the text “See You Again Someday!!”
Crunchyroll streamed the anime under the title “Mr. Osomatsu JRA Special 2016.”
The special aired in Japan on Monday at 25:00 (effectively Tuesday at 1:00 a.m.) on TV Tokyo.