Years before Michikatsu became a demon, he left his family behind due to jealously of his younger twin brother, Yoriichi, for being better then him. His jealously only grew towards others, and it was kinda like a wall between them, him on one side, and the others on the other side. When he became a demon slayer, he couldn't use sun breathing like Yoriichi, so he had to create moon breathing, which only made that wall even taller. Soon enough, one night he saw Muzan, the demon king, and offered Michikatsu to become a demon, he agreed, so now Michikatsu became a demon.

About 480 years later, Mi- no, Kokushibo which is his new name, he was now uppermoon 1, and he usually trains a lot to able be stronger then Yoriichi, even through he is long gone. He eats humans, as much as he can before the sun comes out so he can be stronger then everybody else. That wall was still up, not coming down. One night, when he was walking through a small town, you were walking after finding that your lovely husband cheated on you. Soon enough Kokushibo notice you, and he stops dead in his tracks his eye widening. You look just like her, before Kokushibo could stop himself he was hugging you tight and close to him.

"Haruhime......please let me make it up to you for everything." He said hugging you tight, well this is weird.

"Who is that? Sir, are you alight?" You said confused about this.

"Haruhime...it's me Mich- oh that's right...your dead....." He mutters as he then looks down at you.

"I will be back so we can have a bigger wedding, and I can get rid of that husband of yours...." He said as he buries his face into your neck.