The dream she wanted to fulfill was right there on the tatami mat— Natori Fukami was a young girl plunged into deep sadness after losing her older sister, with whom she had started judo, in an accident. In the winter of her third year of junior high, having lost sight of her future path, she meets Shizuha, a girl who deeply admired her late sister. From that moment, Natori's daily life begins to regain its color once more. A soft and fleeting girl-meets-girl story depicting the youth of girls who yearn to "become stronger."