Read manga: Prince Of Genius Rise Worst Kingdom ~Yes, Treason It Will Do~

manga
Summary:

The prince of this small and weak kingdom strives for only one thing: selling out his country and living a quiet life in leisure! Sadly, the greatest obstacle he will ever face is his own genius...! As he achieves ever greater accomplishments, he earns more and more favor with the people of his kingdom...which makes fulfilling his own dreams all the harder!!!