This is a translation from yatta's fanfic 'Regreso a ti'. Potter ends up in another time, where he must pretend to be someone else and be under the care of Snape. Feelings are born but Harry must return to his time. What will happen when the reunite?

Songfic! In honor of Severus Snape's birthday. At the time of his death, Severus Snape remembers about his friendship with Lily. And now he might get the chance he has wished for to redeem himself and maybe get their friendship back.