Disconnected [nalu]

They were best friends when they were young, joined at the hip. Wherever Lucy was, Natsu was. However, as they grew up at each other's side, Natsu slowly began to love music and started the world famous band Fairy Tail. When his career blew up at the young age of 17, Natsu left to travel with the rest of his band, and slowly lost any kind of communication with his close friend.
What happens when Lucy, a mother of her ex's daughter, reunites with Natsu five years later?