Pandora hearts. Vol. 11 - Jun Mochizuki

Once, following the tragedy of
Sablier, Jack Vessalius made a valiant sacrifice to stop his best
friend, Glen Baskerville, by allowing his body to anchor a set of seals
by which Glen's soul was confined. But now these seals, long guarded by
mages under the watchful gaze of Pandora, are being smashed one by one
at the hands of the Crimson Shinigami, whose aim is to return their
master to his once-whole state. And so, the fragile peace achieved over
the last century begins to writhe, like a horror released from Pandora's
forbidden box...