The strife between the armed dolls and dead soldiers persists in a particular world bubble with no end in sight. With the situation worsening, the stability of the world bubble is slowly declining. To prevent a catastrophe, humans established a distinct organization responsible for managing and directing the dolls. To obscure the unpleasant reality, humans whimsically christened the organization "Renou Xueyuan" or "Doll School." -Haha! I was just kidding. It couldn't be that cutesy, could it?