Ml (top) deep red flag with black dots, for violence and anger issues at the beginning. Becomes later more green with the bottom ( that doesn't mean with everyone). He is pretty submissive then and is being protected by the bottom. No sa or cheating with others in that relationship.
Mc ( bottom) was originally a bright red flag concerning relationship and sleeping around, but stopped before the story started, when he got his child. He is green with the ml, but sometimes has questionable thoughts.
Kiss Me Liar was more of an Unrequited Love between Yeowoon and Keith, (my first read of ZIG, and I actually love the theme unrequited love and It's really good.) I read that one in our Pandemic arc, good read.
Kiss Me If You Can is a story of Joshua and Chase from KML, Joshua in KML was Yeowoon's best friend, and Chase in KML was Keith's friend.
But I'm starting to think, that with the story pace between Kiss Me Liar and Kiss Me If You Can, and the concept and timeline of both stories, I think Kiss Me If You Can happened first, before Kiss Me Liar... (correct me if I'm wrong, it's okay) but yeah.. That's what I think.
But feel free to read KML first before KMIYC^^ Have fun being happy, consumed, chill, confused, sad, and angry lol.
The first story the author released of this universe was Kiss me liar, the pairing is Keith Pittman x Yeonwoo Seo. Grayson was a side character there, also Josh and Dane.
The author Zig wrote last year on her X account, when "Desire me if you can" was in progress, that Grayson's story was actually the first story she came up with when she started with omegaverse. It just took her 10 years to release it.
It's also chronologically the last Miller story of the 6 original ones.
That author actually had two series each six stories planned for that universe, for a very long time. One is the "...if you can" and the other "Kiss me..."( that one has still only one story, I think she wanted to finish the Millers first). She also wrote three are same universe but not part of the series.
I guess she wanted to start with a story who has a korean mc, so she started with KML, but then stopped with that series and only wrote the ...if you can and not related stories.
The author has more than one messed up character. So Grayson is far form the worst, even if it doesn't look like it right now ( still doesn't change that he did some insane shit in the past and the trauma he caused on Chase), and you see how he actually is in his story. Most wanted to read his story, because his pair is Dane. Means he would get kharma and suffer. And Dane is a fan favorite. I wanted to read it, because the pairing of KML pissed me off, trash king x pushover, toxic, power imbalace etc. But Grayson having to deal with Dane promised to be something else.
No, Chase never was Keith's friend, they are aquaintances and have a work relationship.
Keith's friend is Grayson. Chase was only shown one in a weird pic in KML manhwa and in the novel Yeonwoo saw him at that party with dyed hair, but he was mentioned several times.
Release is one thing (KML was first released), but the timeline is even more complicated then you think.
Because if you also count the novels, you actually have 4 stories that are kind of running at the same time.
You have that party which happens in "Kiss me liar" and "Kiss me if you can" and some other events. But then, the newspaper article at the beginning of "Kiss me if you can" is part of the story of "Run away of you can", that prosecutor is the pair of Nathaniel Miller and Grayson mentions that Nathaniel lost for the first time, and against a beta.
And then you have Grayson and the doctor, who mentions that the parents send the youngest son to England, and that just happened in "Deflower me if you can" which is currently in progress. So we actually now know what led to this.

Red or green flag? If red, any signs of redemption arc (apologies and character development)?