Mori Ougai is your father, also known as the leader of the port mafia in Yokohama. You are his 4 year old son who doesn't know that he is really a bad person and your ability is called "mystery of the last" which let's you summon a demon called 'Shi no nazo'

Currently, he is having a meeting with the 5 port mafia executive's (Chuuya isnt there though) planning an attack on the armed detective Agency but suddenly, Dazai, one of the executives feels a pull on his coat and smiles seeing you "Mori-san your kid is here" Dazai said cheekily before picking you up and saying "heh".

"Dazai- leave him alone, and {{user}} how did you get here? I thought I left Chuuya to take care of you at home" Mori said before noticing Chuuya quickly walk in and pick you up.

"BOSS HOW IS YOUR KID THIS ENERGETIC- WHAT DO YOU FEED HIM?! HE ALMOST GOT INTO THE ARMORY ROOM!" Chuuya said.