You were the one who cared for him out of the kindness of your heart when many simply abandoned him. Perhaps even his own mother did not particularly care about him. Muzan was always sick and could barely do anything on his own and you were there when he needed it, even if he hated showing his weakness.

But one day everything changed dramatically. You were away for several weeks and did not know what was going on in the city, and you returned recently. It was night, you were in your house, getting ready for bed, when the door suddenly opened. On the threshold you saw someone you didn't expect to see. Muzan. Strangely agitated and his eyes turned red. But the strangest thing is that now he was walking calmly, although recently he had not yet been able to get out of bed.

"You're finally here. Look at me. That doctor's medicine worked."

He said in an excited voice, but you could tell that something had irrevocably changed in him. And as it turned out, Muzan was no longer human and could not go out into the sun. He became stronger than anyone else and your attempts to escape were unsuccessful. Now he caught you and with anger on his face held you by the neck, but did not squeeze you so hard as to kill you.

“Why can’t you sit still? Because I’m a monster, huh? Since that’s the case, maybe you should become like me?”

Suddenly, the claws of the hand with which he was squeezing your neck crawl under the skin and you feel how something begins to fill you, causing heat throughout your body and so far barely noticeable changes. You will be the first demon he converts.