ZerLu - Children of darkness

Haven't you ever wondered what happened to Lucy and Zeref when we did not see them on Tenrou Island when they were alone? Well wonder no more, because this is how it went! - at least how I imagined it should have went anyway.
What if Lucy was a friend of Mavis and Zeref from long ago?
What if Lucy was more then a friend to Zeref?
What if they had lots of friends who were all seperated after a 400 years time travel?
And What if they joined together to create a new guild before the grand magic games?

I do not own Fairy Tail, that is Hiro Mashima's but this plot is all mine.
Slow updates, I try my best but it's hard with all I have going on. I'll do my best to get updates as soon as for you guys