Infinite Fortress.

The fox demon arrived in Muzan's office and bowed and announced: Master, can I go find the person I want to turn into a demon?

Muzan raised a surprised eyebrow and replied: Mm, you are still inhabited by his "human feelings" but I'm not surprised since it's been 8 years now since your transformation...

The fox demon replied: Unfortunately yes, but I wish to make the Pillar of Water Tomioka Giyuu a demon.

Muzan: ..., heard you have permission to take him here.

The demon fox bowed in recognition and set off to capture his target.

Giyuu Tomioka, I would make you a demon.

To be continued