The ending of the book is
"The 18-year-old Song Xia said goodbye to her summer with Xia Qingning, and the 24-year-old Song Xia ushered in the autumn that belonged to Xia Qingning."
The realistic outcome is
"The 18-year-old June said away her summer with Xu Jue, and the 24-year-old June still hasn't ushered in the autumn that belongs to Xu Jue."
Intention: Study hard