How a Realist Hero Rebuilt the Kingdom

Genjitsu Shugi Yuusha no Oukoku Saikenki (現実主義勇者の王国再建記, lit. How a Realist Hero Rebuilt the Kingdom) is a light novel written by Dojyomaru and illustrated by Fuyuyuki which was published in 2016 by Overlap, Inc. The English translation is done by Sean McCann and is licensed by J-Novel Club LLC to be published in English.

Plot
"O, Hero!" With that cliched line, Kazuya Souma found himself summoned to another world and his adventure--did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the nation! What's more, he's betrothed to the king's daughter now...?! In order to get the country back on its feet, Souma calls the wise, the talented, and the gifted to his side. Five people gather before the newly crowned Souma. Just what are the many talents and abilities they possess...?! What path will his outlook as a realist take Souma and the people of his country down? A revolutionary transferred-to-another-world administrative fantasy series starts here!

Official

 * Official Light Novel Website