[HP/SH] Saladin's Hymn

The day after the final battle, the Chosen One disappeared. Three days later, Severus Snape woke from a coma in the Shrieking Shack, left the wizarding world, and vanished into the Muggle world without a trace. The wizarding world kept moving forward without the Chosen One. People gradually forgot the war and its consequences. Just as history will one day be forgotten, heroes are no different. Three years later, just as almost everyone had given up searching for their Chosen One, a man named Sanes Peruves came to the University of Venice to apply for a professorship in pharmacognosy, only to discover something unusual...