PandoraHearts, Volume 10 (Pandora Hearts #38-41)

A century before, in Sablier, a forbidden portal was flung wide by a boy, Vincent, in his single-minded desire to protect his brother, Gilbert. And thus did that foolhardy desire lead to the corruption of that innocent boy's soul like a sweet poison... Now, as Gil, Oz, and Alice wander the ruins of the former capital, they are assaulted by illusions from the past. But how much of it is real? And how much of it illusion?