Reincarnated Into a Game as the Hero's Friend: Running the Kingdom Behind the Scenes (Light Novel) Vol. 5 (novel)

Thanks to knowing the plot of the classic RPG his world is based on, Werner Von Zehrfeld has stood out both on the battlefield and in the office. But every accomplishment is followed with an even greater challenge. The young viscount must now make for the neglected region of Anheim to face off against the Demon Commander, Gezarius. Will he be able to hold off the demon hordes long enough for his best friend, the Hero, to arrive?