It's Midnight Sun story. It starts with Edward composing a lullaby, thinking about Bella and the quotes are also from Midnight Sun and I think that these quotes basically explain the whole story. He loves her the way she is and doesn't wanna change her and destroy her beautiful soul. And then also the amazing lyrics and song by Patrick Swayze. I played with the song a little bit, edited the sound and at the beginning and in the middle I put a piano cover by David Osborne which I really love and I wanted it there because I thought it was more Edwardish..