(from ebookjapan):
One rainy day, two boys from the Hayabusa Detective Boys see a girl almost hit by a car and disappear like a ghost. The girl looked exactly like Yuriko Tani, a member of the Hayabusa Detective Boys! The members of the Detective Boys see the girl appear and disappear frequently, and soon realize that her appearances and disappearances are similar to the methods of the "4," the phantom thief who has been causing a commotion in the city. What is the true identity of the ghost girl? ......! "The Green Eyes", which was published in Shoujo Club at the same time, is also included in this collection.