Disclaimer- I own nothing of Harry Potter. Except books and a couple movies.
This will start as Severitus and end as Snarry.
Severus Snape loved Harry Potter from the moment he first saw him.
It had been a particularly cold day in March on Spinners End, and it had been sleeting outside. Therefore Severus Snape, the sole inhabitant of Number Seventeen and likely the whole block, was surprised on that day to hear someone, or perhaps something- the world was lost in dubious times in the winter of nineteen eighty-one- knocking on his door. The problem was, really, not that someone had visited in such weather. Any educated witch or wizard could protect themselves from the sleet, and anyone with a good enough reason would brave the weather easily. They were in a war; they had seen people mutilated, destroyed, so far past death and yet still walking; any of the fighters could've stood naked in the Arctic and not flinched. The thing that sent a rush of fear and adrenaline through him, making him shudder, was the question of who had gotten through his wards. Anyone who was permitted within them would have gone through the floo, bringing news that another major fighter had been taken out or the like. News that the side he had betrayed was winning. He could think of no one who would come to knock at his door. It was with a wand in his hand and a knife up his sleeve that he opened the door to greet his guest.
Standing in the doorway before him was a vision. A young woman was there, with creamy pale freckled skin, vivid dark red hair and emerald-green eyes. She stood before him wearing a heavy dark cloak and an ironic expression, and carrying a blue bundle that, upon further examination, was an alert, black-haired baby. The person- or person and a half- was Lily Evans, holding her son, Harry Potter, who blinked dark lashes and looked at him with his mother's green eyes.
He didn't ask why they had come; he simply, wordlessly, let them in. He was handed the woman's cloak, which was dark grey, and the large black bag that all mothers seemed to bring along with children. She breezed past him but then doubled back, tugged her cloak unceremoniously from his arm, and seated herself on his couch, child in one arm and cloak in the other. Severus was left gaping, something he quickly corrected, and holding the bag. After leaving it in the kitchen he re-entered the front room, lingering by the hallway. The woman, Lily, who he had always known as a girl and couldn't seem to connect with this changed person, was still looking up at him with that same expression on her face, amused yet dark.
Finally she spoke, gracing him with her voice for the first time in four years. It was somehow more reserved then it had been, and it helped him to separate this stranger from a girl he had known in another life.
"Hello, Sev."