Kou-1 desu ga Isekai de Joushu Hajimemashita
高1ですが異世界で城主はじめました
A high school freshman named Hiroto Kiyokawa is pulled into a different world through a mysterious old map. Labeled as the Diferente, a savior from another realm, he is tasked by the lord who summoned him to eliminate vampires. Instead, Hiroto decides to pursue an alternative path by founding a nation where various races, including vampires and mummies, can live together.