kokuzanisgoated
Muzan had lived for years, and in all that time he had never been so interested in a human being.
Ever since he had become almost unstoppable, pretty much everything had soon became boring, so it was quite a suprise a mere human could amuse him.
he himself, honestly wasn't sure what was so fascinating about Michikatsu (Kokushibo). Toying with mortals never lasted long, due to Muzans short temper. But the slayer was still alive. somehow. Michikatsu is very fortunate to survive their encounters, but not fortunate enough.
Everytime Muzan stumbled upon Michikatsu he would take peices of him, one by one, but would always leave just enough crumbs behind so that his victim could pull himself together until the next time Muzan antagonized him.