Drarry: If the World Is Like This

Severus Snape, age thirty-eight, died at Voldemort's hands. When he opened his eyes, he found himself sitting on the second-floor landing of the Potter home in Godric's Hollow, with a noisy Savior beside him. What will he choose in this life?

When Draco and Harry become childhood friends, and Harry becomes Harry "The Savior of Spinner's End" Potter, where will their future lead?