About Kenpuren Training Hall: The story is set in the Bakumatsu period. Katsura Kogoro and his passionate Choshu comrades raise the banner of "Shinto Munen-ryu" and join the dojo of Saito Yakuro, a renowned Edo swordsman leading 3,000 disciples. While some senior students have commendable qualities, certain undesirable habits disappoint Katsura. Nevertheless, he remains dedicated to mastering martial arts, practicing swordsmanship day and night while studying how to construct defenses against the Black Ships threatening the Shimonoseki Strait. Saito observes all this, and Katsura gradually stands out among the students...