Yan Yi is a quasi-freshman in high school, but one day a person suddenly comes to the class. That person's name is Bai Gu. But when he comes, there is a strange voice on the radio, and then an inexplicable exam begins. It is unknown whether Bai Gu has anything to do with them, but the two of them have ignorant feelings for each other while getting along. Is this premeditated or calculated? Who is Bai Gu?
A cold and mysterious attack? A little expert in optimistic reasoning is affected.
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Purpose: I have had a dream to lock up the school since I was a child