Your Typical Revenge Plot with an Atypical Protagonist

Revenge.
For Ayanokouji, who grew up in the White Room, it was something hard to fathom. So, when the mysterious outer being who called herself a goddess appeared out of nowhere summoned his entire grade to foreign lands, he didn't think much of it at first.
"This guy is only an E-rank hero, he's useless so I'll discard him. "
Heroes are categorized into ranks, and as the only E-rank, Ayanokouji was quickly ostracized, and his classmates agreed to discard him.
Even then, Ayanokouji won't go down that easily, would he?

Don't ask about the cover, I just used some random image I have saved.