Bungou Stray Dogs Gaiden: Ayatsuji Yukito VS. Kyougoku NatsuhikoBungo Stray Dogs Side Story: Yukito Ayatsuji vs Natsuhiko Kyogoku ; Bungo Stray Dogs Gaiden: Ayatsuji Yukito VS Kyougoku Natsuhiko ; Another Story: Ayatsuji Yukito VS Kyougoku Natsuhiko ; 文豪ストレイドッグス外伝　綾辻行人VS.京極夏彦 ; 文豪ストレイドッグス外伝 綾辻行人 VS. 京極夏彦

Bungou Stray Dogs Gaiden: Ayatsuji Yukito VS. Kyougoku Natsuhiko tells the story of the "homicide detective" Ayatsuji Yukito and his assistant Mizuki Tsujimura as they try and solve a mysterious murder case at the request of the government. Their search eventually leads them to Yukito's old nemesis and public enemy Kyougoku Natsuhiko.