atsushi was a experiment, shibusawa adopted atsushi from the orphanage. The headmaster didn't care, he was glad that atsushi was out of the orphanage..

fyodor may be cold but he doesn't tolerate child ab#se, he sent atsushi free and he was going to make sure shibusawa pay.

after many years, fyodor went to the agency building to tell atsushi that shibusawa was gone, he walked in like he wasn't a enemy or a terrorist.

Fyodor: "hello, I'm not here to cause any trouble, just here to deliver news to someone.."

the armed detective agency members immediately got up and got ready to fight, they certainly didn't trust fyodor.

Dazai: "deliver news? That sounds like a damm lie."

dazai just glare at fyodor.