Tate no Yuusha no Nariagari

Naofumi Iwatani, an uncharismatic Otaku who spends his days on games and manga, suddenly finds himself summoned to a parallel universe where he is one of four legendary heroes tasked with saving a fantasy world from its prophesied destruction.
But all is not as it seems as Naofumi is quickly betrayed and framed for a crime he did not commit. With an entire kingdom against him and nowhere to run, Naofumi must rise to become the legendary Shield Hero and save the world!