share time: 2025-10-31 00:32:05
Lin Xiaoman, a math slacker, was mocked by her classmates in primary school for forgetting 9×9=81—until transfer student Gu Zhao stepped in, saying, "She's just nervous." A decade later, Xiaoman is struggling as a teacher at a failing kids' education center when Gu Zhao calls—now a tech CEO whose company is being framed by rivals with a fake contract encrypted via the "nine-nine multiplication table." When the childhood "81" becomes the key to cracking the contract, the pair reunites and uncovers the truth: Gu Zhao's sudden transfer years ago was to get imported asthma medicine for Xiaoman. And as they team up to expose the rivals' plot, Gu Zhao finally confesses the secret behind "9×9"—"I've always remembered the girl I wanted to protect."
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