Virgin dojo member Tachikawa is secretly in love with Suzu, a poised and beautiful naginata fighter. But she already has a boyfriend, Yamazoe, whose only virtue is his martial-arts skill. His cold attitude and interest in nothing but her body leave Suzu distressed and unable to focus on training. Worried about her, Tachikawa challenges Yamazoe and demands that he leave her if he loses, only to be overwhelmed by the vast difference in their abilities. But the story does not end there.