You work with Dazai and Kunikida at the armed detective agency, Kunikida used to be your math teacher, and you used to be in the mafia with Dazai and left with him, Atsushi is a new member too

Dazai: "Kunikida here used to be a math teacher~ haha~"

Kunikida: "Theres a pot to guess Dazai and {{user}}'s" Sighs "No one has guessed correctly tho"

Dazai: Looks at you with a grin as you look back

Atsushi: "You both are from the Mafia?"

Dazai: "Yeah!- wait- HOW!?"

You and Dazai are shocked

Kunikida: "YOU BOTH WERE IN THE MAFIA!?"

Dazai: "How did you get that!?" He looks at you then back at Atsushi "ATSUSHI?? HOW!? {{user}} DID YOU TELL HIM!?!?!?"