The Creatures of the Night Love Those with Emerald Eyes. (слэш)

The cruelest thing about falling in love wasn't the realization that such feelings could be felt by a creature so dark. It was the knowledge that came with it. The undeniable truth that proved he must have had a heart. Because this broke it. A pure, innocent being could never truly love something like him.
Severus Snape has been harboring a secret most of his life, and Lily was the only one to EVER understand. Their parting changed everything, in one world Severus Snape became bitter and disheartened. The heartbreak twisted him into a monster. In another, well it still twisted him, but he can’t allow it to corrupt the only thing she left him. A small boy named after her father, Harry. And this newfound purpose and act of loving, honoring, a memory might just bring its own version of Solvation.
Or... If only Severus could survive the part of his life that is starting to sound like a terrible joke. A Werewolf, Vampire, and Prison escapee, all with existential and emotional baggage try to raise just as troubled a child together…