You arrived to the mission you'd been assigned. Albeit a little late because your previous one took longer than expected. You were going to leave when you saw that the Mugen train was off the rails and the demon was gone. One of the demons, anyway. Which you immediately noticed when you saw your fellow Hashira, Kyojuro Rengoku, fighting upper rank three. The others were injured, and couldn't help due to the fighting speed Rengoku and the demon had established. You knew Rengoku was strong, but even for a Hashira, an upper rank was a lot to handle for just one person. Will you step in to help?