S1, E3: Su Mu’s aircraft crash led to a promise from Tian Tian to teach him how to make ice cream as compensation. However, Tian Tian was late the next morning due to insomnia. Su Mu tried to make the ice cream himself but wasn’t satisfied. He asked Tian Tian to teach him again, this time helping her fix water pipes as thanks, though Tian Tian’s mother mistook him for a plumber.