O Mine Enemy

When Harry finds an injured Snape on his doorstep and must hide him from the Dursleys, he has no idea that this very, very bad day will be the start of something good.

Harry and Snape are thrown together by annoying relatives, a series of strange dreams, and Voldemort's latest hunt for Harry, but their greatest challenge may well be surviving each other. This will be a long summer unless the two can find a way to work together. A slow-burn enemy-to-mentor story.

Alternate 6th summer (and part of the school year): post-OotP; ignores HBP and DH. No slash, no romance.

archiveofourown.org/works/29013294