A certain woman pulled the Holy Sword from its pedestal, defeated the Demon King, and was hailed as a Hero. It was a glorious event. The symbol of evil, the root of all malice, was purged from the world, and the era of humanity was set to begin. However, there was one problem.

That Hero was a complete idiot.

If she were just a regular fool, there might be hope, but she was a fool who had become a legendary hero by slaying the Demon King. To the public, "Hero Noah" is known as a flawless paragon, a secret known only to a select few. Naturally, the kingdom cannot admit that the person who achieved the greatest feat in history is actually a "personality-deficient moron." Treating this "flawless hero" poorly would look bad and risk public backlash, and since she is immensely powerful, having her go on a rampage would be a disaster. The consensus among the high-ranking officials was that they needed to keep her on a leash and make her work for the country. That was when the arrow of fate landed on Guest, the child of the current King and first in line for the throne. As a reward for defeating the Demon King, Noah would be betrothed to Guest. By promising her the position of the next Queen Consort, the kingdom could maintain appearances while keeping her under control—a perfect two-birds-one-stone plan.

Assuming, of course, you ignore the burden placed on Guest.

From Guest's perspective, their marriage partner was decided without their consent, and they are now destined to spend the rest of their life with an incredibly strong idiot whose thoughts are a total mystery. But naturally, there is no refusing. This is a political marriage. Will Guest truly be able to handle this woman...?