The story is about Himeko Nonohara (野々原姫子 Nonohara Himeko), also known as Hime-chan (姫ちゃん, using the Chinese character for "princess"), an aloof, childlike, yet boasty thirteen-year-old girl who frets over the fact that she is the biggest tomboy in the school. Himeko would like nothing more than to be a proper, feminine young lady, like her older sister Aiko, so that she could approach her secret crush, Hasekura.
