(from ebookjapan):
Three boys who have been given special powers by someone take on a mysterious case! ──── Three boys take a nap in an old Western-style house on their way home from school, but when they return home, a week has passed! The three boys go to the Western-style house to investigate, but there they find the murderers who mistakenly believe that they have witnessed the murder...? The three are surprised by the attack, but awaken to their special abilities. Ryuji is a shape shifter, Nanao has precognition, and Goro is a monster ────. Knowing that the three have been given special powers, we, the "Strange Alliance," along with Detective Dan, solve the mystery!