Because of You (Book One)

There was a girl and her name was Sevannah, no last name and no middle name. This girl lived on her own for a very long time until she breaks into Remus Lupin's house. Remus' wife finds pity in Sevannah and takes her in. For the next few years, Remus and his wife discover that she is indeed a witch. Sevannah meets Dumbledore and he helps her get enrolled. There she meets many people, including a certain blonde haired girl, whom she finds herself thinking about constantly. She also meets the one person who can tell her who she is; Severus Snape. Sevannah's first year at Hogwarts is a rollercoaster; there she finds friendship, family and love.