Crayon Shin-chan Gaiden: O-o-o no Shinnosuke
Japanese title: クレヨンしんちゃん外伝　お・お・お・のしんのすけ
Type: ONA
Source: Manga
Episodes: 13
Status: Finished Airing
Aired: May 31, 2017 to Aug 23, 2017
Duration: 7 min per ep
Rating: G - All Ages
Studios: Shin-Ei Animation
Genres: Comedy, Supernatural
Themes: Parody
Demographics: Seinen

A small country town. Recently, the town has witnessed many strange incidents. A youkai kindergartner O-o-o no Shinnosuke (an apparent homage to the classic supernatural franchise Gegege no Kitarou) and his youkai father Tamatama Dad arrive in town. They are said to be looking for the yokai Big Butt Mom who has run away from home. When an elementary school girl Fumie Sakura is suddenly attacked by the mysterious Fuzzy Wuzzy, a superfluous-hair youkai, Shinnosuke goes to her aid. Their encounter is the start of the greatest youkai case in the small town's history. 

(Source: Amazon)