I want to be the protagonist even though I'm just a side character

One thousand years ago, a prophecy foretold of a hero that would descend upon the world that could finally seal the Horde Chasm.
That hero was called a savior, and he was named Kyros.
A rare human born of two natures: Water and Heat, this hero had unlimited potential and the fame of the entire world.
This is a story about this protagonist...
Not.
Meet Eo, a kid who doesn't like the fact that someone else has taken the spotlight in his own life. He is determined to seal the Horde Chasm himself, and competes with the protagonist's plot armor with his own brain.
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The update rate will be about 1 chapter/day for every arc, with a break in between each arc. The average word length per chapter is about 800, but it can vary from 600-1400, depending on what is going on at the moment.
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Picture is by me. Yes I know it looks dorky. Oh well. I don't like taking random images off the internet, so I guess, uh... don't judge a book by its cover?