NO SPOILER

Would have given it a higher rating but the story and character development deteriorated soon after volume 4.
Togata was funny and had some depth. Agnis was not the brightest (combat wise, cool). Others that seemed interesting were not developed further. The ending felt rushed.
Hence a 6/10 for story and characters.

The art is amazing. The sketchy/messy style fits the world/genre. And although we have seen elemental powers before, the use of those powers was unique and the fighting was well choreographed and creative. I found myself eager for a fight scene and those did not disappoint. Fujimoto Tatsuki san did not slack in that bit.

An overall 7/10.