Bungo stray dogs: Wan!

"Regaining consciousness after nearly losing his life to Akutagawa, Atsushi is paralyzed by the thought of inviting more death and destruction upon his companions at the Armed Detective Agency. But before he can make good on his vow to leave the agency, the Mafia sends Ryuurou Hirotsu -- of the merciless Black Lizard group -- to storm their offices! Between the Black Lizards and the bomb-tossing Motojirou Kajii, and the demure, kimono-wearing Kyouka...