Lin Nianyu, a psychology professor who has returned from overseas, has outstanding academic ability, but is emotionally blank because of a crush that ended in nothing when he was in college. Shen Chi, the swimming genius who once fascinated her, retired due to injury at his peak and left without saying goodbye. Many years later, Shen Chi came back as a specially appointed sports coach of the university, blocking the way she had to go to and from get out of class every day, and used humorous tricks to "harass" her, euphemistically calling it "the crematorium for chasing wives." Lin Nianyu was cold and resistant on the surface, but inside he was in chaos. As the two frequently intersected due to work, the truth about Shen Chi's departure, his unspoken affection, and Lin Nianyu's secret love that had been silently following his competition for many years gradually emerged. On one side is her infatuation that has been hidden for many years, and on the other side is his guilt and reluctance caused by scars. This two-way secret love started by a "misunderstanding" evolved into an extreme sadomasochism in the siege of the city. In the end, the two worked together to uncover the past, Shen Chi rekindled his fighting spirit in a new career field (sports commentary/management), and Lin Nianyu also let go of his guard, achieving dual perfection of emotion and self.