Waruiotoko 
Only the Villainous Lord Wields the Power to Level Up: Volume 5 [EPUB ebook] 

Having destroyed the Luaranz Kingdom and South Runan Kingdom, Erhin has finally laid the foundation for the New Eintorian Kingdom. However, as king of a fledgling nation, he faces a mountain of new problems. With the kingdom’s coffers low and a food shortage on the horizon, Erhin decides to focus on stabilizing domestic issues while keeping the other nations in check. Unfortunately, the neighboring countries now see the New Eintorian Kingdom as a threat, and they suddenly declare war! What’s more, Medelian seems to show up on every battlefield Erhin heads to. Can Erhin fend off both internal and external crises, or will the New Eintorian Kingdom fall before it has the chance to rise?