Why Natsu and Hageyama hate each other?
I will explain this today with a deep story that involves another character of mine.

In High School years, Natsu and Hageyama were rivals in various sports they compete, Natsu usually won all them, that made the rhino beetle pretty frustrated. When Haru, Natsu's younger brother, entered in High School, Hageyama started to bully him in order to call for Natsu's attention. Haru despite being bullied a lot by the big bug, he never felt deep hate for him, also he never hit him back because he is the pacifist kind of person.

One day Hageyama caught Haru in an awful mood. When the big bug tried to hurt him, Natsu just released his pink claws and cutted Hageyama's face. Yes, that's the origin of Hageyama's scar in his right eye.

After that day Hageyama never bullied Haru again.

Well was good trying something different for once, I know some anatomy isn't "spetacular" but I'm still doing my best to do good stuff. I'm actually pretty happy with the result here. :)