How he became like this

The Chaos Dragon Slayer was know to be trained by the dragon Acnologia. He was feared by his guild members. And the enemies might as well have waved a white flag and surrendered.

Who was Chaos? Why none other than Natsu Dragneel. He was know to wear a white scarf around his strange salmon hair. And has black/blue flames.

But what happens when he meets a certain celestial mage, who has all of the zodiac keys, and has the star dresses? And what happens when he discovers her chaotic side? Will she change him? Or will he change her? And will the guild rip them apart? And what happens when Acnologia comes back?

P.S. you might hate Lisanna in this story.