The lonely and silent elementary school baseball coach (played by Wu Kangren) always has a decadent temperament between his eyebrows. He teaches children to play baseball carefully during the day and eats noodles alone at night. The residents of the town all know that his wife Liuhua (played by Yao Anqi) ran away with someone, leaving him alone to live a lonely and empty life. The elevator lady Xiaozun (played by Pan Zhimin) has a gentle personality and doesn't like to compete with others. She always has a well-trained smile on her face and never complains about life. Until one day, she ran into her boyfriend having a secret meeting with another woman. But Xiaozun didn't have the slightest anger. At this time, she decided to change her current life. Xiaozun took away the pufferfish she and her boyfriend raised together, and decided to auction it off and start a new life. Its buyer was the lone baseball coach. A pufferfish that was once a witness to love changed the direction of the lives of the two lovers, and their love was shaking like a pufferfish.