The Chief decides to give the main B.A.B.E.L. staff a company vacation at an outside onsen retreat in the mountains, and everything is running smoothly until Minamoto starts suspecting two foreigners due to suspicious circumstances after the chief's and Ichirō's yukata go missing. Minamoto and Shūji tail the blond man with sunglasses, while The Children secretly follow the foreign woman. The woman restrains Aoi and Shiho and incites a fight with Kaoru that ends after Minamoto interferes. The blond man reveals that he and the woman are special espers from Comerica, and are here to capture internationally-wanted criminal espers. Following this, the criminals are revealed, and the children help in their capture. The members of B.A.B.E.L. spend the rest of their vacation in leisure.