The Anime Multiverse: The Shiba Blade Path

Although he lived in an extraordinary world, Baichuan still felt that urban legends like the God-Slaying Demon King, the Seventh Godslayer; the King of the Demons, the Fourth True Ancestor; and the Goddess's Warriors, the Bronze Five, as well as the six magical girls led by Emiya Kiritsugu, were all worlds away from him.

But the day he completed a hidden quest in a game and became the Apocalypse Demon King, Baichuan's ordinary world was turned upside down for good.

Emiya Shirou:

“Dad, you suddenly disappeared from my side. Was it because, ”

“That’s right.”

Emiya Kiritsugu looked up at the sky.

“I’m going to guide Illya as a magical girl.”