Young swordswoman Hibiki takes over her family's martial arts school following the death of her father, who was the head instructor. Despite being only a freshman, she serves as captain of her school's kendo club, leading and training her fellow members. However, team morale is low, and with a major tournament approaching, Hibiki faces her struggles alone. That changes when a quiet, introverted club member named Nakamura discovers her secret and begins blackmailing her, gradually driving her into a corner.