CROSSTEAMER |~| O. DAZAI x M!READER

(Name) is a member of the Port Mafia who is commonly used for undercover missions. Whether those missions be infiltrating an organization that had plans to fight against the Port Mafia or generally acting as a regular, good-willed citizen, he was always assigned to those.
The mission that he was assigned to this time around was... different. It was the usual undercover mission. He was instructed to make his way into the Armed Detective Agency for... a person? It wasn't information, for once. His job was to bring back a certain someone that had previously been in the Port Mafia.

Osamu Dazai; the youngest Port Mafia executive and Demon Prodigy.

(Name) was skeptical, but who wouldn't accept a mission like this if their freedom was on the line? So, from that day on, (Name) was an official "member" of the Armed Detective Agency; however, he was just a good-for-nothing CROSSTEAMER.