Hikaru and Tamakin are summoned to the mountains by Inspector Kimochi. However, what awaits them there are the evil monsters that they had captured before! The three youkai are bent on revenge against Hikaru, and they form a gang to stand in front of him. Yes, the so-called boss rush! "Well then, case closed. Turn yourself in!" Tamakin is overwhelmingly strong as he faces off against the three attacking animals. Tamakin wins the fierce four-way battle! However, a mysterious woman appears in front of Hikaru and his friends. She has a history with Hikaru's parents, and is the mastermind behind ....... What is the fate of Tamakin the monster cat and Hikaru the Specter Detective?