Marimo no Hana: Saikyou Butouha Shougakusei Densetsu

まりもの花はな ～～最強さいきょー武闘ぶとー派は小学生しょーがくせい伝説でんせつ～～

The story of the manga centers around Marimo Nogami, a usually quiet fourth-grade girl in elementary school. However, a certain incident leads to Marimo's personal strength blossoming.