Harry comes back to Hogwarts as a professor, not expecting to develop a crush on the new Headmaster. Severus Snape.

To avoid the machinations of the minestry, Harry must marry a reluctant Severus Snape. But marriage to snape is only the beginning of Harry's problems. Voldemort has returned, and before too long Harry's marriage may determine the world fate.

From archive of our own https://archiveofourown.org/works/39093249 The description: Harry dies on the courtyard at the end of his fourth year, but nobody knows it. All thinking, Voldemort has missed his targets. Harry returns to Hogwarts with an unconscious Cedric and with a warning from DEATH himself. In the next few month, Harry finds out many secrets what changes his opinion of many people, is changing in body and mind. He hears of Severus Snapes disappearance and later of his dead, killed by Voldemort. Two years later, as Voldemort attacks the ministry, Harry decides to take the chance and goes to Slytherin manner to kill a snake. Then he found his target in one of the rooms, but it wasn't the snake what let Harry freezing on his spot. There, lying on a bed, he saw no other than his old Potions Professor, Severus Snape, with a little toddler on his chest, both sleeping and Nagini curled up around them.

a Harry Potter story by 99Blackpanther99. i really liked it so decided to published it here. not mine!! Harry is about to graduate from Hogwarts and is hoping to become an Auror. The headmaster assigns him a mission which will guarantee him a place in Auror training, however, the mission turns out to be a lot more than he expected (with a fair amount of smut).

After the war Harry got a letter from Professor McGonagall that Severus Snape was alive. Harry went to watch over the man while he recovered and they got close. After his break up with Ginny Harry got a job as the Flying instructor at Hogwarts. Lots of spelling errors. Sorry