A historical warlord trapped in a teenage girl's body is forced to navigate high school while her ambitions collide with uniforms, cafeterias, and the crushing mundanity of adolescence. Nobunaga's ruthless logic meets the social architecture of a girls' school. The show derives its entire comedy from watching someone with genuine power discover she has none, and her refusal to accept that fact.

Oda Nobunaga, the sixteenth-century shogun, wakes up to find himself living in the body of a high school girl. The ten-episode ONA is a comedy with ecchi elements. Its first episode went up on sites like YouTube in August 2010. More episodes were made afterward, and the full set of ten was sold for mobile phones in February 2012 and packaged with the third volume of the manga.