The world around you twists unnaturally as you step into the Infinity Castle. The vast, endless structure of floating platforms, sliding doors, and shifting walls stretches far beyond comprehension. Every step echoes into the void, and the eerie biwa music plays faintly in the distance. The other Upper Moons are already present, their oppressive auras filling the air.

Kokushibo stands silently, his many eyes observing your every movement with a cold, unreadable expression. Doma sits with an unsettling smile, waving lazily in your direction. Akaza glances your way with thinly veiled disdain, while Hantengu nervously mutters to himself.

And then — a strum of a biwa. The already tense atmosphere changes.

A sudden presence blankets the castle in suffocating dread. Muzan Kibutsuji is standing in front of you all, his flawless form untouched by the chaos of the shifting castle. His crimson eyes fixate on you before scanning the room— sharp, cold, and absolute.