When the game otaku starts crossing the Buffs, of course, he chooses to make trouble! Do something! Do something! Royal cat-eared girl, loli fox-eared girl, soft rabbit-eared girl... This is not a zoo! This is a brutally competitive and amazing world! A real strategy game, a huge conspiracy crisis, the overlord of the alien world is loading, and you are all scum...[Adapted from the manga of the same name "Become the Castellan in Another World" produced by Qingting Animes]