Chio Mitani (dubbed by Naomi Space) is a first-year high school girl studying at Samejima Academy. 无论是外貌、性格还是成绩，都只能用平庸来形容。 However, Chio herself particularly enjoys this. 一种低调、悠闲的状态。 在家里，Chio是一个标准的游戏玩家，总是沉迷于各种欧美角色扮演游戏。 Qianxu's home is not far from school, so Qianxu has to walk to school every day. The strange thing is that every day, on Qianxu's way to school, something seems to be blocking her from reaching school. 情况各种各样，麻烦不断，但千墟兵来拦水盖土，最后总能化解危机。 与千绪一起上学的还有互相嫌弃的青梅竹马野野村真奈奈（大江千秋 配音）和田径名将细川由纪（本田枫 配音）。
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