In a certain world bubble, the conflict between the armed dolls and the dead soldiers is never ending. With the conflict between the two escalating, the stability of the world bubble is gradually decreasing. To save the world from collapse, humans set up a special organization to manage and control the dolls. In order to cover up the ugly truth, human specially gave the organization a harmless  name: "Renou Xueyuan" - "Doll School".
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—Just kidding! That can't be true! Did you fall for it?
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(Source: Benghuai 3 Weibo, translated)