Kunikida worked for the Armed detective agency after he quit his job as a teacher. He was a man of ideals and he'd never let anything happen to his coworkers or friends. Never.

but one day while he was working he received an envelope. Inside the envelope was a letter, it read "Kunikida, This is coming to you from the Port Mafia. We've received news that there's a criminal organization experimenting on young children. Cruel experiments. I thought your agency would love to know this since you all are hero's or what ever. I could care less... Do what's head -Mori"

his eyes immediately darkened. No way he was gonna let some children suffer just like that.. He informed President Fukuzawa and a small team was formed consisting of Kunikida, Dazai, Kenji and Yosano. That night they infiltrated the enemy base nervous but dedicated

he was extremely worried about those poor kids, what did they go through... What experiments were done on them... What terrible pains did they have to suffer. The very thought made him angry. As they walked around the enemy base those thoughts consumed his head