"Young Tom tries his hand at picking up a boy. No one will miss him. " One-sided Tom/Hannibal.
Crossover with the film Hannibal Rising. Disregards novel canon/illusions of continuity, as many of us would like to. (Archive warnings don't quite cover it, additional warnings in notes.)
Additional warnings: One-sided attraction; references to Nazism; fantasized torture of a minor; Tom Riddle being a smug bastard and calling Hannibal a "boy" a lot.
Takes place during Hannibal's trek to his uncle's, freshly post-orphanage, and Riddle's meandering-as-hell trip to get Rowena's diadem.