Historias de Bsdfifteen

A Y/N story in a BSD and MHA crossover fanfic. It has both the infiltration plot and the field trip plot. Y/N Nakahara is suddenly called by Dazai for the first time in five years. She is told to go on a mission to Mustafa and infiltrate UA. In the background, the rest of the port Mafia seems to be preparing for something. What exactly is Dazai planning?