Natsu Dragneel is a dragon slayer, mostly anyway. Of course, when you're a dragon slayer unlike any other, issues tend to pop up. There's the ever present desire to show his worth, but not against ordinary mages. There is also the desire to find a mate, and one platinum blonde certainly isn't helping. And there's always the promise he made to Zeref about fighting a death god.
All things considered, Harry's life hadn't gone to complete shit. Sure, he'd essentially disappeared from the wizarding world for a year and a half but, in his opinion, his reclusivity made sense. Of course, he didn't imagine his friends felt the same but everything looks perfect from far away. Sometimes though, all you need is a push in the right direction and a certain Weasley.
Life was harsh. Until his Godfather showed up and made some serious changes. Harry goes to live with Sirius when he is eight, as Sirius decided to... Bring some help when he went hunting after Pettigrew. Harry has a better chance in life, now armed with family and friends. They'll keep him afloat. They will keep large traits. HarryxGinny because yes. Have fun! Enjoy the story!