Title: Not All Is Lost
Pairing: Voldemort/Harry, others implied.
Disclaimer: The characters belong to JK Rowling. I'm not making any money from this.
Artist's notes: I tried to include the following elements of your request: postwar, Voldermort encouraging the destruction of the world, Snape playing both sides but ultimately aiding Harry, blowjobs, hair touching/pulling. I hope you like it. :-)