Crayon Shin-chan Gaiden: Kazokuzure Ookami
Japanese title: クレヨンしんちゃん外伝 家族連れ狼
Type: ONA
Source: Manga
Episodes: 13
Status: Finished Airing
Aired: Feb 22, 2017 to May 17, 2017
Duration: 7 min per ep
Rating: G - All Ages
Studios: Shin-Ei Animation
Genres: Action, Comedy, Ecchi
Themes: Samurai
Demographics: Seinen

Master butt-swordsman Hiroshinosuke Nohara (Lone Wolf) travels with his family seeking employment. The family encounters a mysterious girl Hazumi and a wild dog Shiro, and decides to travel together. The group is attacked by various assassins, eventually their lives are threatened by the butt-swordsmen's enemy, the armpit-swordsmen of the Demon Bull Clan. Who will win: butts or armpits? Against an array of idiosyncratic enemies, Hiroshinosuke Nohara and his son Shinnosuke have the chance to display their swashbuckling skills.

(Source: ANN)