Nobunaga no Shinobi: Nobunaga to Minarai Shinobi
English title: Ninja Girl & Samurai Master: Episode 0
Japanese title: 信長の忍び 第0話『信長と見習い忍び』
Alternative titles: Nobunaga no Shinobi Episode 0
Type: Special
Source: 4-koma manga
Episodes: 1
Status: Finished Airing
Aired: Mar 25, 2016
Duration: 5 min
Rating: PG-13 - Teens 13 or older
Studios: TMS Entertainment
Genres: Comedy
Themes: Historical

Oda Nobunaga saves a girl from drowning one day. She clumsily tells him that she's a shinobi. Instead of attempting to kill him, she swears to serve him one day after hearing his plans to unify Japan.

(Source: Crunchyroll)