Snape's Promise

AU:Dumbledore decides that the Dursleys are not a suitable family for Harry. He asks Snape to take in his rival's son, appealing to the man's enduring devotion to Lily and the promise he made to her. A reluctant Snape takes in an eight-year-old Harry, and with him the challenge of parenthood . Severitus: Snape as Harry's guardian (not biological father) NO SLASH, pairings TBD.