With her old-fashioned suit, unchanging hairstyle and thick myopic glasses on the bridge of her nose, the nerdy-looking spinster turned out to be the "extremely fresh teacher" who was feared by delinquent students in more than a dozen rubbish schools across the country. Of course, Feng Yuexi is by no means a passionate teacher like "Yamaguchi Kumiko", but she has found an upright identity for herself to educate her "younger generations". How would such an extremely talented master flap her butterfly wings in an era when history has no records?