The Shield Hero who came from another world

Naofumi Iwatani was a natural hero; the Spirit of the Shield knew that too well, scratch that, it was prideful about it. Before being a Cardinal hero, he had already earned the title in another world. Instead of returning to his world, he appears in Merlomarc, asking him to be a hero once again. It's a shame because he has no other choice. Chaps 1, 2 rewritten. Beta by Milarqui