Pandorahearts Vol 18

The tragedy that befell a bustling city a hundred years earlier. Eyes of ill omen. Stone seals. The warped gears that began turning long ago play out a requiem for one who was much loved. The solemn sound of the dirge colors the world that hears its notes a melancholy gray...as though it was always meant to be...

Presents additional backstory on Oz, and follows the relationship between Jack and Lacie.

Pandora, now under the control of Leo and the Baskervilles, bears witness as the truth of the being known as Oz Vessalius is exposed for all to see. Amidst the warped tragedy that plays out mercilessly, one who has lost everything catches a glimpse of the ridiculous fairy tale contrived by a living ghost, as though a forbidden box has just been opened...

Guided by Jack Vessalius, the man from Alice's memories, Oz wanders back into the world of lost memories in search of Alice. There, he stumbles upon the devastating tragedy of Sablier, the century-old disaster which sent the old capital into the Abyss, an incident of which no one has any recollection...except Alice, who was there?! When Oz discovers the truth of the memories Alice so desperately wants to forget, the powers of the B-Rabbit will spiral out of control and threaten the lives of all who are trapped within the dreamlike dimension, including Alice herself...

Having returned from the infernal Abyss only to find his whole world changed, young "sinner" Oz Vessalius embarks on an attempt at normalcy after being reunited with his best friend and valet, Gilbert, whom he had presumed dead. But during a trip into town with Gil and Alice, an unexpected encounter leads Oz down memory lane...For Oz, however, the path is one covered with the most menacing of thorns. And lying in wait to assail him there...The baleful eye of his father and the echoes of cursed words Oz would much rather forget...

The air of celebration surrounding fifteen-year-old Oz Vessalius's coming-of-age ceremony quickly turns to horror when he is condemned for a sin about which he knows nothing. He is thrown into an eternal, inescapable prison known as the Abyss from which there is no escape. There, he meets a young girl named Alice, who is not what she seems. Now that the relentless cogs of fate have begun to turn, do they lead only to crushing despair for Oz, or is there some shred of hope for him to grasp on to?

Oz. Leo. Inescapable tragedy assaults and binds the two. He is no more. That simple truth tears their hearts apart like castles of sand caving in . . . But will history repeat itself when, in the midst of their sorrow, the two are pitted against each other in a struggle that could end in catastrophe?