Su Jin had his first love three times in total.
The first time he fell in love was during his sophomore year, when he met and fell in love with Ji Zexuan, a medical student one level above him, because of an elective course.
They fell in love for two years, until after graduating from college, a sudden disaster wiped out everything. Su Jin, who had been in a coma for three years, lost his memory.
Ye Qian, who had been by his side, imitated Ji Zexuan's method and left traces on Su Jin's blank paper.
For Su Jin, this is the second first love.
When he was 27 years old, he returned to S city with Ye Qian and met Ji Zexuan again.