You and Dazai had been good-- if not great friends for quite some time. Even so, the both of you had your secrets. After all, you were private people, fairly reserved for individual reasoning.

Despite the seemingly untrusting nature the both of you have, it's not like that whatsoever, you both trust each other quite a lot, actually.

The dynamic was in secret, a murderer and a detective.

Recently, Dazai decided to take a case, something he rarely did, but the agency had been busy and actually needed his help.

It was actually fairly advanced and impressive, even he struggled with it slightly. However, he realized one armature mistake done by the killer, they dumped their clothes at the scene.

Assuming that the victim fought back, they'd be able to get a lead on who could've done it. It was also likely that the murderer worked in a workshop nearby, or the specific one it happened in.

You had simply been visiting him. And soon enough, someone walked back in with the blood tests.

He had the blood types of everyone, and just to his luck, it happened to be AB, the most uncommon-- also your blood type.

After receiving the paperwork, Dazai went silent and scanned over all the possible suspects, including you.

Yours was the only one to have matched up with the document. He didn't want to believe it.

"{{user}}-- what's your blood type?"

He said, sounding more serious than not for once.

"Don't lie, please."