Osomatsu-san

is a 2015 comedy anime television series by Pierrot, based on Fujio Akatsuka's 1962 manga series, Osomatsu-kun. Celebrating Akatsuka's eightieth birthday, the series follows the sextuplet Matsuno brothers from the original series as adults, and features more adult-oriented humor compared to the original series. The series aired in Japan between October 2015 and March 2016, with a special episode airing in December 2016. A second season premiered in October 2017. Both seasons have been licensed in North, Central and South America by Viz Media. A manga adaptation by Masako Shitaro began serialization in Shueisha's You magazine from January 2016.

Plot
As a sequel to the original Osomatsu-kun series, the story follows the miscellaneous adventures of the mischievous Matsuno sextuplets; Osomatsu, Karamatsu, Choromatsu, Ichimatsu, Jyushimatsu, and Todomatsu. Ten years older from their original counterparts, all of the siblings have now grown up into lazy NEETs, with each brother having developed their own distinguishing personality.