In the third year of Bunkyu, the anti-shogunate faction defeated the pro-shogunate faction, and the era of swords came to an end - the Tokugawa period. As a swordsman, Kunihiro Horikawa and Izumi-no-kami Kanesada, who was once used as a weapon by their master, ran on a rainy mountain road. Inspired by the Shinsengumi, the swordsmen embarked on the path of Fusangshin. Their mission is to defeat the Time Travel Army that attempts to change history in order to protect the "correct history." Together with new partners such as Mutsu-no-kami Yoshiyuki, Yagen Toshiro, Tonkiri, and Tsurumaru Kuninaga, they throw themselves into the battle against the Time Travel Army in a turbulent era. Blades swing, swords flash and shadows. Swordsmen, go out immediately