Disclaimer: Harry Potter and all the characters of said series belong to J.K. Rowling.

I own nothing.

……………………

Snape had always viewed Draco as a son.
It was no accident that Narcissa had asked him to give the unbreakable vow. Behind
the pretenses of showing loyalty to the death eaters, and helping to accomplish the greatest
mission they had ever undertaken, she had come to him with the knowledge of what Draco
meant to him and what Snape would do to keep him safe.

Lucius.
The name still seemed to carry some sort of magical quality to him, as though he could
summon the elder Malfoy just by using the word. There still stretched a line of control
connecting Severus to the man despite the years of separation between them. Duty, and
Narcissa, had held more of an importance for them then each other. Or maybe it was
that they both clung too tightly to the emotion of pride to ever admit that what they had
felt in their youth could have shaped the men they grew into.

But Snape could remember.
Mornings spent sneaking off to the room of requirement to practice the dark arts that
meant so much to the both of them. Days spent upon the lawn taunting that Potter boy.
And the one breathless fight shared that ended in Lucius pushing him against the wall
and stepping forward into Severus' mouth.

Everything about their relationship seemed about the struggle of two powers fighting for
dominance. Severus remembered, with a smirk, that the blond haired man had seemed to
come out on top more often then naught – and in more ways then one.
There was no doubt in Snape's mind that it could never last.
After graduation Lucius had conceded to his family's wishes and married Narcissa - who,
although lacked the heat and finesse with which both Lucius and Severus commanded the
dark arts, made up for it by being able to bare children. A son. Which should have been,
and would always seem to him to be, his son. The one they never could have had together.

So he would keep safe the Malfoy boy as if he were protecting a piece of Lucius himself.
For him he had sold his soul to the devil, for him he had helped wage a war against the
rest of the world... and he would protect the one piece of him he had left.

Or keep trying until the darkness finally claimed him.