List of Gaiden Chapters

Bungo Stray Dogs Gaiden: Ayatsuji Yukito VS. Kyōgoku Natsuhiko (文豪ストレイドッグス外伝　綾辻行人VS.京極夏彦,) is the manga adaptation of the novel with the same name. It is written by Kafka Asagiri and illustrated by Oyoyo.

Plot
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?!

Not yet in tankōbon volume

 * Chapter 3.4: Marshland / Afternoon / Cloudy④
 * Chapter 3.5: Marshland / Afternoon / Cloudy⑤
 * Chapter 4: Justice Ministry Main Building / Morning / Sunny①
 * Chapter 4.2: Justice Ministry Main Building / Morning / Sunny②
 * Chapter 4.3: Justice Ministry Main Building / Morning / Sunny③
 * Chapter 4.4: Justice Ministry Main Building / Morning / Sunny④
 * Chapter 4.5: Justice Ministry Main Building / Morning / Sunny⑤
 * Chapter 4.6: Justice Ministry Main Building / Morning / Sunny⑥
 * Chapter 4.7: Justice Ministry Main Building / Morning / Sunny⑦
 * Chapter 4.8: Justice Ministry Main Building / Morning / Sunny⑧