Changing Kira

Quietly, Lita Kirosaki rose to the top of the class in her studies. She was in cram school with a boy known as Light Yagami, and he helped her a lot in her studies. She was also aquatinted with Sayu, and was good friends with her. But what will happen when she goes over to Sayu's house to watch movies and accidentally finds the secret Light kept hidden in his room? What will happen when she suddenly starts seeing Ryuk, and slowly loses her sanity?

What will happen when Light can't kill her because she doesn't even know her own birth name...