​Akutagawa joined the Armed Detective Agency to search for his long-lost sister, and Ranpo Edogawa is just the man he needs. Unfortunately, the capricious investigator isn't interested. He lays down a condition for his assistance--each member of the agency will give Akutagawa a test, and he'll have to clear them all if he wants Ranpo's help. Willing to do anything in his quest for vengeance, Akutagawa begins with Kenji Miyazawa's challenge to...plant a rice paddy? The alternate world of Bungo Stray Dogs: Beast continues!