Survival in Another World with My Mistress! manga volume 5 features story by Ryuto and art by Sasayuki.

Kousuke uses his amazing crafting powers to transform the Great Omitt Badlands into a massive complex of fortresses! Sylphy deploys liberation squadrons to free the peoples of the Kingdom of Merinard from the clutches of the Holy Kingdom, but the Holy Kingdom’s army is pursuing the caravans of refugees! Can Kousuke complete his preparations, save a nation of hapless beastpeople, and satisfy the military and personal demands of his loving mistress in time?!