How unfair is it when Roa enters a new world with his friend's classmates, he is as weak as a regular person while everyone else is outrageously overpowered?

Roa soons learns that he cannot even gain experience, leaving him to be forever cast as a failure by the people who summoned him.

As the outlier of the group, he is thrown into an endless abyss when he tries to help the group. Cut off the road of a hero, what path will he take? Rather, what path will Roa forge when he learns that the world isn't as black and white as he thought?