Seeing all the comments that it might be a trap i hope it's not true. I need their reunion...

I'm afraid it's most likely a trap.
This totally looks like the ending of the flashback

wait hOLD ON
WHY ARE U SAYING THAT
WHAT SORCERY IS THIS???

WAAAAAAIIIITTTTT....
What flashback? Why can't I remember?

....flashback...? FUUUJRO9IVGFHV;

In the very start of the manga they are older.
The flashback start a bit after this chapter --> http://www.mangago.zone/read-manga/19_days/bt/311115/Ch45/1/

I don't think it's a trap since Jian yi will dissappear in high school .. they still in middle school now so I think it's too early for the flash back moment to come..only if there will be a time skip xP

Er... well, basically, the most part of the story is a flashback. The manhua itself tells you so. Don't you remember how on the beginning they were older?

Well no. I don't really remember... this manhwa is long y'know. So I've most likely forgotten the details in the start (￣∇￣")