The Dragon Overlord (смешанная)

This story comes about as a reader of mine by the name of PhazonLordKaito, asked me if I could try my hand at doing a crossover between Fairy Tail and Overlord with Natsu as the Overlord. I thought about it and decided I would give it a try.
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 was too weak and dangerous to go with them. Now, with this, hearing a few things he didn’t want to hear, the death of his childhood (and only) friend, Lisanna, and meeting a certain minion changes the future for one Natsu Dragneel.