Fushi no Kami: Volume 6

After returning to Itsutsu, Ash and Maika make quite an impact at their engagement parade by showing up in their lab’s newest toy: a steam car! Meanwhile, Marquis Datura and Viscount Yanga are scheming to incite a revolt in the Sacula region. To make matters worse, it appears to be true that demons strike when humans are in a state of discord. A pack of werewolves is headed for the Sacula region! Luckily, the Territory Reform Promotion Office still has an ace up its sleeve... This is the sixth chapter of the story about a young boy who set out to create his ideal life by rebuilding civilization and revolutionizing the world!

[From J-Novel Club]