What was stolen from us (слэш)

Harry Potter’s life is almost perfect - married to Ginny, father to a bright, mischievous little boy, and working as an Auror. But everything changes when his son befriends another boy in kindergarten who could be his twin.
The children’s uncanny resemblance forces buried truths to the surface: a love Harry once had, stolen by potions and lies.
As memories return, so do the pieces of a future that was meant to be—with Severus Snape, the man Harry loved and lost, and the son Severus raised without him.