Ecstatic Detective Agency is the 13th chapter of Bungo Stray Dogs.
Kyouka is accepted into the Agency, but there are still fears about her getting arrested by the police for her crimes. The police officer Minoura asks the Agency to solve a strange case of a moving vehicle suddenly exploding. Kenji decides to go on the case and invites Atsushi to join him. Kenji's cheerful airheadedness and earnestness allows him to find the culprits: a gang who wanted to exterminate their rivals. The gang tries to attack them, but Kenji uses his ability to easily beat them all.