Bungou Stray Dogs Gaiden: Ayatsuji Yukito VS Kyougoku Natsuhiko

Known for his biting wit and rapid-fire brain cells, Yukito Ayatsuji is a detective and top-ranked skill user who possesses the ability to expose any crime. When a request to investigate a puzzling murder incident hits his desk, Ayatsuji must team up with Mizuki Tsujimura, a spunky agent sent from the Special Division, to tackle the case. Can the unlikely duo get to the bottom of this mystery?!
(Source: Yen Press)
Note: Includes the prologue.