How Realist Hero Rebuilt Kingdom Light Novel Volume 15

When the aggressively pragmatic Kazuya Souma is summoned to another world as a hero, he's not given a quest, he's given a kingdom to rule. On top of that, he's betrothed to the previous king's daughter! To get the country back in order, Souma gathers a group of gifted individuals to his side. Will their impressive talents and his own knack for logistics be enough to get the country on its feet again?