The Rising of the Sword Hero:

Erica Scarlet, an uncharismatic Otaku who spends the day on video games and manga', suddenly finds herself summoned to a parallel universe! She discovers she is one of the four heroes equipped with legendary weapons and tasked with saving the world from its prophesied destruction. As the Sword Hero, the strongest of the heroes, all is not as it seems. Erica is soon alone, penniless, and betrayed. With no one to turn to, and nowhere to run, she is left only with her swords. Now, Erica most rise to become the legendary Sword Hero and save the world!