It's been two years after the war and Hogwarts is rebuilt. The school year has started with McGonagall as Headmistress. ...She froze at the sight of a black figure standing at the top of the stairs...She's pulled out of her stupor by her name being repeated by the figure. "Minervaaah"...

Minerva McGonagall and Harry Potter go to the Shrieking Shack to retrieve Severus Snape's dead body. Rated T just in case ;)