seaching for a Snape is Harrys father fic

by Durga Kali

Hi I am looking for a fic featuring Snape as Harrys father but not as a lover or in any kind of romantic partner to Lily. There is this scene when he tells Harry that his turning away from Voldemort was out of his own selfish reasons not because somehow Lily changed his view.

I am searching for a fic I read couple of years ago.

Snape is Harry's father but has not the usual romantic back story with Lily. He is very much a believer in pureblood supremacy and turned from Voldemort for his own selfish reasons. I do not remember much about the story but those few facts that Harry does move to live with him in the dungeons. I think that Harry is still younger or at least not really in his teens but Voldemort is at least rising in power if not yet back completely however I am not sure about those.

The only think I do remember very clearly is the scene when Snape tells Harry that in no way did his mother changes his view about purebloods nor was she somehow a 'romantic notion' to turn him around.

Also Snapes character is very edged and at one point he does remember Harry that his father is a deatheater.

I a grateful for any help or hint. Not sure if the story was stored at or in another archive, but I think it was here. Also it might have been deleted over the years since my search turned up empty.

thanks kali