The Rising of the Shield Hero Season 4

Naofumi Iwatani, a Japanese otaku, becomes the "Shield Hero" after being summoned to Melromarc, a kingdom plagued by the Waves of Catastrophe. Alongside the other Cardinal Heroes, Naofumi is tasked with vanquishing the Waves, but his lack of offensive capabilities and meager shield set him apart from his peers. Betrayed and falsely accused, Naofumi is shunned by the kingdom's people, leading him to acquire a demi-human slave, Raphtalia, and begin a journey of self-strengthening. As the Waves draw near, Naofumi and Raphtalia must defend the kingdom and its people from impending disaster.