Giyū and Shinobu vs. Dōma

In the early morning hours of the third day of Taishō 5, Mushibashira Kochō Shinobu calls Mizubashira Tomioka Giyū to the Butterfly Mansion to discuss something with him. However, shortly after he arrives, a Kasugai Crow arrives with an emergency summon. The Ubuyashiki Mansion is under attack, and the Final Battle has begun.