The Osomatsu sextuplets are in for a wild ride when their next OAV releasing tomorrow in Japan, but ahead of then, the official YouTube account for the Mr. Osomatsu franchise released a brand new video promoting the work as well as the ending theme song “Ignition!!! feat. Matsuno-ke 6 Kyoudai & Hipipo-zoku to Akatsuka-ku no Nakama-tachi” from PUNPEE.
The Mr. Osomatsu OAV, which is titled Mr. Osomatsu: ~Hipipozoku to Kagayaku Kajitsu~ (“Mr. Osomatsu ~The Hipipo Tribe and the Glimmering Fruit~”), starts its theatrical release on July 8. A second OAV is scheduled to premiere in 2023 with Yoshinori Odaka (BEM) directing both at Studio Pierrot.
The three Mr. Osomatsu TV anime seasons and previous film are streaming here on Crunchyroll, which describes the franchise as such:
Mr. Osomatsu is based off of the gag manga series Osomatsu-kun by Fujio Akatsuka, and ran from 1962 to 1969. The series features a set of sextuplets, the Matsuno brothers, with Osomatsu being the oldest brother and leader of the group.
Source: Mr. Osomatsu on Twitter