It's an interesting story with insane elements. I did find the font a bit difficult to read, though I do understand the choice to use a less formal font. I am a bit curious why the wolf's heat was too great to remain in football, but not enough to interfere with badminton, but not everything needs to make sense in this world.
Given the tone of the rest of the novel, I did feel mc's backstory was just a bit too dark and plausible... (suicide after not living up to unrealistic expectations is unfortunately way too common). Dark is fine, but maybe chaos in a more absurd way? Like hitting a birdie directly onto a jumbotron sign, causing it to shortcircuit and burst into flames, fall over, and crush people in the stands sort of crazy? I could imagine him telling the events like it was some sort of war flashback. Just a thought.
I did enjoy the parody elements of the story. I think in general the story took itself just seriously enough to have a functioning plot while balancing the absurdity.