This is a country without racial distinction, and all the previous kings are not of the same race. However, today's society under white rule is often turbulent. There is even a group of crazy organizations that capture teenagers of various races and use them as guinea pigs for experiments. However, this experiment miraculously succeeded on a boy named Claude, and there was a precedent for success. After that, groups of teenagers and girls became well-known "people with special abilities". The boy rescued the girl in an experiment and taught her the ability to speak. As time passed, the monster's power gradually emerged from the girl, and he learned that the girl's identity was unusual.
The various events that happened to the girl gradually became clear...