dMatsu-san
Japanese title: d松さん
Alternative titles: Mr. dMatsu, Osomatsu-san 2nd Season Side Stories
Type: ONA
Source: Manga
Episodes: 12
Status: Finished Airing
Aired: Jan 9, 2018 to Mar 27, 2018
Duration: 1 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Pierrot
Genres: Comedy
Themes: Gag Humor, Parody

The short series will be divided into two arcs. The "Totoko x Muttsugo" (Totoko x Sextuplets) arc will feature the six brothers having conversations with Totoko, who will be depicted as "a certain princess." This story will have six "versions," one for each brother. The "Iyami x Muttsugo" (Iyami x Sextuplets) arc will feature the six brothers and their everyday life with Iyami. It will also have six "versions," one for each brother. 

(Source: ANN)