Zhou Jiangnan, a "dusting" worker in a tunnel project, fainted due to fatigue and was reborn and returned to high school. Recalling his humble pursuit of the school belle Zhao Wanwan in his previous life, but only getting a cold look in return, he suddenly came to his senses, tore up the love letter on the spot, and determined not to be a "dog licker" again. At this time, he only had disgust and alienation towards Zhao Wanwan, and even bluntly said, "Even Ruhua is better than her", completely cutting off his past emotional obsessions.
