My Days As a Detective at Hogwarts

As a time traveler from the Harry Potter universe, Vilan Costa always considered himself lucky. This was because in the timeline he traveled to, the infamous Voldemort had just reached the pinnacle of his power when he was assassinated by an unknown powerful wizard. He and Harry enrolled at Hogwarts at the same time, studying together in Gryffindor House. Harry lacked the lightning-shaped scar and the reputation of a savior, but he had both parents and a happy family. Vilan spent his first three years at Hogwarts uneventfully, until the summer vacation of his third year, when everything changed. His right eye developed a problem. After several days of unsuccessful treatment, it gained a unique ability—in short, it could accurately detect tiny marks on objects...