The book exists before the warriors do, which means every choice they've already made is written down somewhere, and they're walking toward it anyway. Suzunagi doesn't fight them. She just shows them what they want most, then asks if they're brave enough to want something else instead. This OVA is 50% recycled footage and it still lands because it's not interested in spectacle; it's interested in whether five samurai can choose their own story when the universe has already chosen it for them.
Five legendary warriors discover a centuries-old manuscript that details their lives with impossible accuracy. Every battle they've fought, every sacrifice they've made, already written down before they were even born. The revelation shatters everything they thought they understood about their purpose and free will. Into their confusion steps Suzunagi, a mysterious woman who seems to know their deepest desires: freedom from the endless cycle of combat, new power, a chance at normal lives. She offers them a way out, a choice that no puppet should be able to make. But her interest in their armor runs deeper than compassion, and her true intentions remain obscured. As the warriors grapple with existential questions about destiny and agency, they must determine whether accepting Suzunagi's salvation means betraying their mission, or if breaking free from a predetermined fate is the only way to truly matter. The line between liberation and manipulation blurs with every encounter.