Real Bout High School
From Animepedia
Real Bout High School is about a high school girl named Ryoko. She practices Kendo, the way of the Samurai. She is also a Demon Lord, the Demon Lord of Yannen. Though this has no actual relevance to the anime series. We learn that this title is for show, and when transported into the other world she gains tremendous strength. She eventually defeats ultimate evil with her friends thus saving the world. And such ends the series with a quiet exit.
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