For Whom the Bell Tolls (слэш)

In 1998, Lord Voldemort fell, and Hogwarts fell with him.
The story of what occurred on the 2nd of May is a tale of celebration, but now a darker legend begins to circle around the Wizarding World- the tale of the spirit that never left.
Rumors have spread that Hogwarts has one remaining occupant- a figure that appears in the Astronomy Tower each night, and rings the bells of the Clock Tower on the same hour that Voldemort died.
Fresh from a grueling divorce, Harry Potter is the last hope the Ministry of Magic has of discovering the truth behind the rumors. He is also the only person still investigating why Severus Snape's body was never found after the war.
With his marriage crumbling, and the disappearance of Snape four years ago still haunting him, Harry must decide if he is ready to become a hero once again.
What secrets does Hogwarts still hold for The Boy Who Lived? And what is at stake for the man for whom the bells toll?