Rosetta wants to shut herself away from the world.

Humanity was being cornered by mutated beasts called "sub-humans." Driven from the continent, the sub-humans pursued them relentlessly even to the peninsula where they had fled. ——And in a decisive battle undertaken as a last desperate gamble, humanity suffered a catastrophic defeat. Princess Rosetta, who had survived by staying behind on guard duty, decided to give up early, accepting that nothing could be done anymore. She barricaded herself in the fortress and resolved to quietly wait for that time to come. While the people around her lamented and grieved, Rosetta was trying to spend today leisurely as well——. ※Some characters from my past works will appear. This is a festival story that doubles as a side story. Since this is written for the author's stress relief, please view it with a long-term perspective.