I'm a King on an Alien Planet

Wen San never dreamed that after more than twenty years of hard study, but ultimately mediocre and incompetent, he would one day become the supreme leader of the most powerful race in the "Osside" galaxy - the "Saike" tribe. From then on, he commanded many "testers" and thousands of alien orcs under his command, fought and conquered, dominated one side, and finally allowed the "Saike" tribe to regain its former glory.