Changing Fate (слэш)

After Sirius dies right in front of him, a desolate Harry would sooner die himself than be sent back to the Dursleys one more time. Voldemort gets creative, however, and instead of dying, Harry finds himself rocketed twenty years into the past and straight into the memories from Severus' pensieve. Harry reacts without considering the consequences, as per the norm, and saves Severus from his family. He only meant to spare an innocent pain, but in saving Severus and securing his alliance, he has set in motion a series of ancient prophecies as old as written history and changed the course of fate forever.