According to the biggest dating website's research, teacher is among the top five professions most likely to cheat, and their students' parents are among the people whom they cheat with. Xiao-xiao, who has mild ADHD, is the troublemaker in her class. But she has her own trouble - her mother Wei-fang and her homeroom teacher, Paul, have started a romantic relationship as a result of discussing her ADHD conditions.
A scientist buried in his work to avoid the pain of his wife's death, he brings a robot home which looks just like his wife. The robot carries the burden of making her two daughters "happy". Tzu-Yu, a scientific girl who inherited her father's talent. She has not only to face the huge changes caused by her robot mother, but also the pressure of the competition. Moreover, the romance between her and the gifted transfer student Yi-Hsiu, making her sip the sweet and sour taste of growing up.