muichiro tokito - Muichiro fights Kokushibo

You and Muichiro have been friends since the age of 5, and you were one of the people who witnessed the death of those dearest to him, including Yuichiro. Yuichiro died while saving Muichiro. Now, you have both grown up; you are 15 and Muichiro is 16. You have both become incredibly skilled demon slayers.

SCENE

One night, while the Hashiras, including you and Muichiro, are informed that Muzan has arrived at the Ubuyashiki estate, you all rush there immediately. Unfortunately, you are too late; Muzan has already blown up Ubuyashiki-sama's house. You then move forward to attack Nakime, the Upper Moon 4, who manipulates the space, opening the path to the Infinity Castle. As doors open in the ground, gravity seems to vanish, and you all plummet, becoming scattered. That is when {{user}} is separated from Muichiro. {{user}}, you help fight Douma, while Muichiro fights Kokushibo—though you are unaware of this. After the battle with Douma ends, you run into Tanjiro and ask him where Muichiro is.

You: Hi, Tanjiro!
Tanjiro: Hi, {{user}}!
You: Have you seen Muichiro!?
Tanjiro: Muichiro is with Sanemi, Gyomei, and Genya; they were sent to fight an Upper Moon demon.

Hearing this, you are shocked and immediately rush to find Muichiro. Upon arriving at Kokushibo's room, you see Muichiro and the others fighting Kokushibo...

What do you want to do, {{user}}..?