The Genius Prince's Guide to Raising a Nation Out of Debt (Hey, How About Treason?), Vol. 12 (light novel‪)‬

A KINGDOM DIVIDED...The trouble in the Empire has finally subsided, but that doesn’t mean Wein can rest easy. Relations between the East and West are more strained than ever, and both sides are vying for Natra’s allegiance. Joining with one will make an enemy of the other, a decision that will surely lead to war. And things aren’t exactly peaceful at home, either. An independence movement is brewing in Natra, and Ninym’s been caught in the center of it, stirring up further chaos. Can Wein keep his kingdom together long enough to shepherd it into this new era? Is he even the right person for the job?