the mystery of a man in a blue cloak that people claim to have seen around town. The rumor spreads and makes it sound like something supernatural is involved. At the same time, a wallet filled with fake cash is found after being dropped, which becomes part of the strange situation. Kanna gets curious about the story and investigates, while Chuzenji-sensei calmly analyzes the clues. In the end, he explains that the events are not supernatural but connected to a logical explanation behind the suspicious man and the fake money.