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Xu Yingyu, the youngest chief police officer of the Four Majors, received the mission and pretended to be a high school student to approach the target Lin Shu. Xu Yingyu used her identity as Xu Ying to show her favor to Lin Shu in every possible way. Why did you transfer to this school? For Lin Shu's sake, why do you send food to Lin Shu? Because you were afraid that he would be hungry, why did you help Lin Shu everywhere? Because I like him, this is something that the whole school knows, and no one doesn't complain about it. One night, Xu Yingyu suddenly wanted to solve a math problem that was unsolvable in the world. This problem he had done in his senior year of high school was seen by his roommate who had not been back for several weeks. From then on, his roommate began to pester him in every possible way for no reason. "Classmate Xu, you only got third place in the exam? Just under that forest or something?" "Classmate Xu, you are very good at controlling points." "Xu Ying? Your name? It sounds nice and suits you very well." "Classmate Xu, please don't ignore me all the time." Xu Yingyu: "..."