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When Jiang Luo, a transfer student, entered Class 3 of the second grade of high school, he brought with him the rift of a single-parent family and the problem-solving logic of "emotions being useless". As a cold-blooded top student who was airborne from a provincial key point, he was used to cutting up his life with competition questions, until he met Xia Ju with a high ponytail - that girl who used orange soda as a "redemption prop". She would force candy on him when he had low blood sugar, and even wrote the pride of "Jiang Luo is my deskmate" in every dazzling smile. He hid the heartbeat curve drawn with a function image on the draft paper, but when Xia Ju blocked the flying basketball for him, he discovered for the first time that the rational formula could not calculate the acceleration of the heartbeat; she took the "Academic Master Protection Plan" as a matter of course, but when she saw the auxiliary line he drew for herself, she missed half a breath.