15 Years ago, in order to protect her sister, she walked into that gray world alone; 15 years later, she was bloody and invincible, with ceiling-level combat effectiveness and kindergarten-level social skills. One night, she received a new mission - to go to high school in the city where her sister lived. How should she welcome her new life? How should she deal with the friendliness or hostility of her classmates? Is the world of high school students really as innocent as she imagined?
Concept: Eleven High School is never a simple world for children. A group of girls deal with and compete among campus factions. In addition to fighting, they also have to learn to weigh the pros and cons, negotiate, and find their own way of survival among interests, suspicion, and betrayal.