Nalu Story: E.N.D and E.L.H

In this story, Natsu is not the only one who is a demon. Lucy is also a demon. They are both from the Fairy Tail Guild and in the past, they were known as E.N.D and E.L.H. In this story the two demons were in love in the past. Zeref was Natsu's brother and Mavis was going to get married to Zeref before she died from an unknown illness. E.N.D and E.L.H sacrificed themselves for not only each other, but for their two kids, Nashi and Lukas, the twins. Follow Natsu and Lucy as they finally remember the past. What will they do when they finally remember? Will they go and find their kids? Has Mavis known it was them the whole time? And will they forgive Zeref for the trouble he has caused all of Earthland?
(This takes place before the 7 year gap and everyone already knows they can see Mavis.)