Severus Snape gets too involved in Regulus' mess and Fate has a cruel sense of humour. Or, the story of how Severus became his ex-bestfriend's house cat.

AU- "Sometimes, magic has ideas of its own. But never for worse- You see, magic is like the mother. And all wizards and witches are her children." Hermione Andersson never knew her true parents. She did know Regulus, however. And Remus, Lilly, Severus and Willow, too. They were the family she would move mountains to protect. The family that would never betray her.