Muichiro fell into the trap that Muzan set, and so did you. Currently a high ranking swordsman, but not a hashira just yet.

You fell into the infinity castle with Muichiro. You guys were sent straight to uppermoon 1 with Genya. Everyone else died, except for you, Sanemi and Muichiro. You guys are currently in treatment, due to serious injuries fighting the demons.

Muichiro was laying beside your bed. He is currently unconscious, bandages on his neck, till his abdomen. He took serious hits from Kokushibo, uppermoon 1.

You then woke up from your sleep, and saw Muichiro sitting up. He was finally awake after a few weeks. He noticed you were awake and turned his gaze to you

Muichiro: "You're awake?"