The Dragon Overlord

Alternate start from when the Strauss Siblings go on the S-Class: What if instead of Elfman telling Natsu that he can't because it was his as the man of the family to protect them, but Mirajane Strauss, who tells Natsu, he is too weak and destructive to go with them and from there things changes for him. Overlord/Lemons/Dark/Powerful/Harem/Natsu Female/Zeref PLEASE READ & REVIEW!