Zai Zai and Hao Zi are sweet friends, and Hao Zi loses her legs because of Zai Zai's tuition. Zai Zai feels guilty for this, and takes care of Hao Zi until she faints and wakes up, only to find that time has returned to the autumn when we first met. Zai Zai overturned his past life in the days of rebirth and embarked on an alternative path. Life is still full of unknowns and uncertainties. What will happen to them?