Love Evolutionism tells the story of the single girl Anan (played by Gao Bei Ting) who is at a critical age in life. She works as an advertising company white-collar and her ex-boyfriend continues to annoy her, so she moves to a new place, where her neighbor is a brother-sister duo. Brother Pan Xiaoke (played by Duan Yi Hong) is a doctor of biology with knowledge about the biological science who always use it to view daily life. Sister Pan Xiaoxing.