It originates from the story of a wise and sinister brother who deceives his sister, who is a serious middle school student, into being the system, and then plays happily in various time and space (O(∩_∩)O~)! There are many stories, which occasionally involve youth campus, vampires, ancient palaces, and rivers and lakes. . . . This is a newbie writing, sorry if I don't like it=￣ω￣=
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