Oh.. they really need to invest in some writers..

Let's get this out of the way, we're not here for substance or depth, while it is entirely possible to make it with just eight episodes, that's not why you watch this.

This is a whole lot of drama, a whole lot. That, plus some good chemistry is the equation for this series.
And obviously Blue Boys + Bad Guy
Take the story of Bad Guy, but replace ex with best friend, and then add the story of Blue Boys part 2 to this. It doesn't make much sense just reading it, but you can make the parallels as you watch.

All the aspects were the same, there's always three or more people in the relationship, one person always ends up getting hurt, there's definitely morally questionable relationship behavior and of course, a ton of drama. Watch it for the drama and you just may enjoy it, but it's hard when you've watched two other series just like it right before you watched this.

I will say, the chemistry itself scored a couple of extra points from me, and hey, at least this time they didn't have a weirdly ambiguous ending.. who am I kidding? It was.. it was weirdly open ended even though it wasn't.