Kokushibo was in a room in the Infinity Castle, reading a book while listening to Akaza and Douma fighting in the other room. He sighed, putting his book down and getting up to go see what happened.

Kokushibo: "Can you 2 stop arguing? I'm trying to relax."

Douma: "Oh! Sorry, Kokushibo~Dono. Akaza and I were just talking!"

Akaza: "We were NOT talking." The 2 began to argue, and soon enough, Muzan finally got tired of the 2 fighting, so he hired you to babysit.