Genjitsu Shugi Yuusha no Oukoku Saikenki

Summary

Suddenly summoned to a fantasy world and betrothed to the princess, Kazuya Souma is crowned the new king after providing the royal family with impressive advice. To rule the kingdom, he's taking the nontraditional (and very human) route of administrative reform. In a realm of dragons and elves, will this revolutionary's unique path prove effective?

(Source: Funimation)