Shichika and Togame are now five months into their quest and have just arrived in Satsuma where they hope to retrieve the Yoroi Sword. However, both the sword (which takes the form of a Western-style suit of armour) and its owner, legendary pirate Kanara Azekura (an expert in defensive combat) will pose a difficult problem for Shichika. Things then become even more complicated than usual when Azekura declares his love for Togame and the fight quickly becomes about much more than simply collecting another Deviant Sword.