Kudou Shinichi is living his life as Edogawa Conan, but those days seem like they might end pretty soon. The Black Syndicate is coming dangerously close to learning the truth about Shinichi having survived. Conan and everybody around him may end up dead if he doesn't manage to find Irish—a member of the Black Organization who has infiltrated the police forces, currently investigating a big serial murder case.

Yako Katsuragi is an acclaimed high school detective, who, despite her young age, has solved many cases. In fact, there seems to be no case that she can't solve, or any culprit that escapes justice. But within the walls of her detective agency lies the secret to her prolific crime-solving skills: the cases are actually solved by her assistant, Neuro Nougami. However, to call Neuro an ordinary man would be incorrect. In reality, he is a demon, who came to the human world in search of the ultimate mystery, having already solved every mystery in the demon world. With Yako as his proxy, he feasts on the negative energy released by humans when they commit crimes. Thus, he promises to help Yako solve the mystery of her father's death. But to do so, he must avoid drawing too much attention to himself, which is why Yako plays the role of the detective. Majin Tantei Nougami Neuro follows this unlikely duo as they solve case after case to satisfy Neuro's ravenous appetite and Yako's desperate search for the truth of her father's death.

Bundled with the 11th volume of Kanojo ga Flag wo Oraretara light novel.

Today, the imperial court is soliciting traversals, giving them various positions according to their talents, changing the civilization after the fall, and trying to create a new world. Zuo Yunqi is just an ordinary young master, mixed with the court in disguise as a spy to save his father. However, he was recognized by one hired specifically to spot such spies, and the two engaged in an epic battle of wits. When the two jointly prevented a terrifying conspiracy, they found that the traversals secretly established an alliance to try to overthrow those in power and build a new society of peaceful coexistence. Zuo Yunqi and his party were forced to participate in this battle.