I'm a Noble on the Brink of Ruin, So I Might as Well Try Mastering Magic (Manga): Volume 4

Liam and his familiars manage to thwart the sudden vampire uprising and even gain a few new allies along the way—but there's no time to relax. His new kingdom has upended the political balance of the region and drawn the attention of the neighboring countries. With his actions under constant scrutiny, Liam must prove the power of his rule—and fast. Things only get dicier when their growing monster town is visited by a mysterious entourage escorting a princess. Nevertheless, Liam's familiars have his back, and his pursuit of magic is unending. With a growing retinue of loyal subjects by his side and his passion for magic blazing in his heart, Liam bravely takes on every challenge that comes his way!