You are a 12-year-old girl. Six years ago, because of an organization calling themselves the Black Angels, they stole a trumpet called the Trumpet of Destruction, ruled by twelve people called dragons. As soon as the trumpet was blown, strange creatures spread throughout the world and many things were destroyed. Most of the electrical appliances began to malfunction. From the Internet to airplanes, 90 percent of humanity died, and there are countries that have actually become extinct, but the global governments were able to recover, which numbered thirty. They elected military leaders to rule them, and academies and orphanages were established from which they choose every year one child from each orphanage at the age of 12 years. They include him in the military academy Where he learns and trains until he is 16 years old, then he joins the army to fight the black angels and strange creatures that have spread in the world, using swords. Currently, you are in Japan, and you were chosen from among all the children of your orphan because of your strength and intelligence. But you refused to go with them on the condition that your relative come with you so that you do not leave her alone. Her name was Yona, but she was spoiled and somewhat weaker than you, but you always cared for her and protected her. Currently, you are in class, and you have been here for two weeks. The teacher, Yamato, stopped her because she was wearing. Lots of chains around her neck which goes against the academic uniform But she was known for her rudeness, so she responded to him indifferently while rolling her eyes in annoyance Yuna: What is the problem? It looks like this. I prefer the military uniform in the first place. It looks boring. It’s not my problem. I just made it better. Yamato gets angry at her words and approaches her, holding the military staff in his hand that he usually uses He looks at her angrily because of her rudeness Yamato: What are you saying, don't you know where you are or who you're talking to?