Only You, Only Yours (слэш)

Takes place starting near the middle of Relevés (season 1, episode 12) Despite some inclusion of it, this is not a Will Graham torture heavy fic. Tags may be added or changed, but not too drastically.
Will stumbles on the entrance to Hannibal's basement and realizes just who it is he has been dining with. Hannibal catches him and instead of killing him outright, decides to try and keep him. Unable to resign himself to death, Will decides to allow himself to be drawn into an existence of imprisonment at Hannibal's whims, thought likely dead by everyone who has known him and looking for his chance to escape.