they dont look middle school at all that im so confused with the timeline lol

middle school in china is 7-9th grade, and their in their last year meaning their 15 lol

but still tho, they also are too hot even for being 15(￣∇￣")

They shouldn't be in middle school now because in the beginning Zhan Xixi said he went to elementary with Jian Yi and that he disappeared in middle school. Then at the start of high school he showed up

he disappeared in the second day of high school. not middle school. re-read if you need to again http://www.mangago.zone/read-manga/19_days/bt/311115/Ch45/

so yes, they are in middle school rn. the start of zheng xi being in university is when jian yi popped back up again, not high school. they will at least be 18 by then. jian yi hasn't disappeared yet in what we are currently reading, but eventually he does on the second day of high school, author will likely and hopefully do a time skip to speed things up, he comes back, and thats about when pretty much all the characters officially get together.

illustration example: http://www.mangago.zone/read-manga/19_days/bt/d_chapter-267.1/pg-1/

if he disappeared in high school then got back in college watdahel thats 6 years right?????

AH I See alright i saw the comment below already lmao i thought it was 6 years