
I'm really surprised there are people still interested in this manhwa. The story is verrry slow and cold. The art is great though, such a waste of talent and time.

How much more deep are you thinking? We've gotten backstory on near everyone, but I look forward if there are anymore. This is fairly normal pace for romance manga at least. And if you want to talk slow, try skip beat. Nearly 300 chapters, and the main couple are just NOW confessing to each other. And it comes out once a month, so that's long over a decade we waited for that. To me, anything shorter than that is alright.

When did they kiss in Christmas? Did I miss that?

It's pretty easy to miss. It's just a single suggestive panel anyway. Not much detail.
http://www.mangago.zone/read-manga/suki_ni_nattara_dame_desu_ka/uu/cad6f828ea6be645aee7f37e78f21cd2_chapter-5/pg-44/
Upper most panel on the left.
╮( ̄▽ ̄)╭
Too long
Manhua readers: first time?