It will premier in October 2.

The Official website of the anime of Mr. Osomatsu has uploaded a new trailer which you can see bellow:

Anime News Network describes the story as follows:

Osomatsu-kun manga and “high tension comedy” TV anime, which centered on the Matsuno household with six naughty and mischievous sons (who are sextuplets). All of the sextuplets, including the eldest Osomatsu, are all in love with the same girl, Totoko. The original Osomatsu-kun series followed the family when the sons were 10 years old. The current show re-imagines the original manga and TV anime with the sextuplets as adults.”

Yoichi Fujita is back as the Director for the second season at Studio Pierrot.

Via: Anime News Network