Love Formula episode 6

On the first day of reporting to the university, Jian Dan, a village girl from Shenmu Village, accidentally pushed Han Yan Sheng , the president of the swimming club, into the swimming pool. Because he could not successfully obtain credits for club activities, Jian Dan could not obtain a scholarship on campus, so he had to start his rock climbing club. However, on campus, the more Jian Dan wanted to keep a distance from Han Yan Sheng, the more fate played tricks on Jian Dan, and their common hobby, "mathematics," made them more closely connected. By chance, Han Yan Sheng discovered that "Hypatia", who matched his interest in mathematics, was Jian Dan. At the same time, Jian Dan discovered the secret behind Han Yan Sheng's inability to swim, which also touched on the painful memories that Han Yansheng had been hiding in his heart... (Source: Chinese = Douban || Translation = MyDramaList)