Oh. This makes a lot of sense then. So all of this is happening now in middle school. Jian disappears in middle school. Then when does the story begin?
All of this is the prequel. What is the present?
They're currently in middle school. 2nd day of high school, Jian Yi disappears. When Xixi is in college, Jian Yi comes back, but he has to to complete high school, so he can't go to college with Xixi.
So basically, this is all a flashback, the present is when Xixi is in college and Jian Yi is finishing high school
Guys I re-read and he DISAPEARS the SECOND DAY OF HIGHSCHOOL (╯°Д °)╯╧╧