The Rising of the Shield Hero

Iwatani Naofumi, an ordinary otaku, finds a book in the library that summons him to another world. He's chosen as the Shield Hero, one of the Four Cardinal Heroes alongside the sword, spear, and bow, and his job is to fight the Waves of Catastrophe. Thrilled at the thought of a grand adventure, Naofumi sets out with his party. But just a few days later, he's betrayed and loses all his money, his dignity, and the respect of those around him. No longer able to trust anyone, he buys a slave named Raphtalia and takes on both the Waves and the world. But can he really find a way to turn this hopeless situation around?