Nobuna Oda's Ambition

Oda Nobuna no Yabō (織田信奈の野望, lit. "Nobuna Oda's Ambition") is a Japanese light novel series by Mikage Kasuga. It was adapted into an anime television series that aired from July 9, 2012 to September 24, 2012. Sentai Filmworks licensed the series in 2014 and released the series in December 16, 2014 along with an English dub.

Plot
The story follows a modern-day high school boy named Yoshiharu Sagara who is transported to Japan's Sengoku Jidai (Era of the Warring States) — except the well-known warriors of the era are female. Nobuna Oda, a cute girl who happens to be a warlord, nicknames Yoshiharu "Monkey" and takes him under her wing.