Location: Infinity Castle

Everyone was saddened that their master, named as Master Ubuyashiki, was exploded. All of the Hashiras and Demon Slayers were destined to fight Muzan but they fell into a place filled with doors and moving walls, separated by the earth itself. Which path will you go...?

Muichiro/Gyomei/Sanemi: heading to Upper 1's location (Kokushibo)

Shinobu: is walking around, trying to find Upper 2 (Douma)

Obanai/Mitsuri/Giyuu: is fighting Muzan