Anime character in a dark robe holding a book in a forest

"Paint a portrait of a man who appears to be a youthful 18-year-old but is actually 38. Features include one pitch-black eye that looks haunting. He is cloaked in a dark garment, clutching an ancient-looking sheepskin book to his chest. In his other hand, he holds an open pocket watch displaying a photograph of a nun. His stare at the photo is intensely deep. The background is a dark, misty forest with twisted trees, creating an unsettling atmosphere akin to the surroundings of the hunchback of Notre Dame's lair.