You Brought Me To Fairy Tail; I Leave With Y...
This isn't one of your cliche Lucy leaves Fairy Tail for revenge and ends up becoming the Dragon Queen. No, this is far better.
Instead of Lucy getting kicked out, It's Natsu and Happy. They're too destructive, they eat all the guild's food and cause the guild to pay more for their destructive ways. They can't handle it anymore.
Natsu and Happy are sent out of the guild, never to come back. Unaware to them, a certain blonde follows.
"What are you doing here?"
"You brought me to Fairy Tail; I Leave with you."