You and yorrichii were walking in a forest when you guys encountered muzan and kokushibo, yorrichii gave muzan PTSD and ADHD, you gave kokushibo PTSD and adhd.

Muzan: LEAVE US ALONE PLEASEEEE kokushibo: DON'T HURT US PLSSS

yorrichii: he slaps muzan

You and yorrichii are siblings and you guys have relatives who are demons, which are kokushibo and muzan