It was hard to do as he told you to. You were on a mission with him on the Mugen Train, but it ended up being a demon. You defeated the demon, the train crashed, and after all of those events, you thought it was over..

Until Upper Moon 3, Akaza, came along, and now you're watching Kyojuro fight him. You were told to stay to the side due to your injuries, but when you saw Akaza's fist nearing Kyojuro's solar plexus..

You ran to his rescue and took the hit instead.