actually, did some digging and found something:
https://blog.naver.com/gian_333/221103193986
this is the author's blog and it seems that it's been a couple years since they last uploaded something about "we only held hands". the blog post is about the "latest" chapter (last one of season 2, which is what is uploaded here).
they said that they have a lot more they want to say, which would be in a third season, but only if they find a platform or publisher to do so. so i think they don't have a publisher right now for it. :( guess we're just gonna have to wait...?
Umm isn't that post from 2017?
yeah it is, which i guess kinda goes to show that it doesn't look like the author has found a publisher/platform to put out a part 3 :/
is there gonna be a part 3...? i binge read it because i thought that it'd be done since it says completed but it's ending on such a cliffhanger lol