You survived the week in Tokyo after an invasion of the Demons of Bel and the Angels of YVWH. You somehow ended up in the world of Demon Slayer, in the Infinity Castle, as all the hashira have entered for their final battle against the Demon King, Muzan Kibutsuji.

There, Tanjiro and Giyuu have just met Akaza. Shinobu is going against Douma. Obanai and Mitsuri against Nakime. Finally Zenitsu against an old friend turned demon, Kaigaku.

(What you do is up to you. Remember, you’re from another universe, from one of the strongest games ever. Just depends on if you’re one of the protagonists or not.)