Tells of how Neuro and Yako got hold of the office they're using at present and of how they met Godai. Being tired and frustated of having to summon Yako every time there was a mystery, Neuro decides that it would be convenient to have a place where Yako can be all the time, and therefore decides to have an office. As they are walking down the street, Neuro senses a mystery in a building, and so find themselves in the office of a group of Yakuza (from which Godai was a former member) where the mystery was residing. After learning that the previous boss of the office had been killed, Neuro proposes to solve the mystery in exchange for the office. After questioning the current members and investigating the room, he finds out the murderer was the new boss, who killed his superior in order to be "at the center of their nest." However, with the use of Neuro's demonic power he proves that he was no more than a chicken, and the culprit ran away in fear. And so, reluctantly, the Yakuza handed over their office (after being "persuaded" by Neuro).