Reincarnated Into a Game as the Hero's Friend: Running the Kingdom Behind the Scenes (Light Novel) V

They may have separate missions, but Lord Werner - a Japanese office worker reincarnated into the world of a classic RPG - and his friend, the legendary hero Mazel, are both working to save the realm in their own ways. While Mazel walks the path of radiance, slaying the Demon Lord’s minions one by one, Werner uses his real-world knowledge to help manage the kingdom’s internal affairs. Managing refugees, fixing the water supply - it’s a lot of work for a supposed background character!