There is one more episode till the end, but here is my opinion.
This part was totally different from the first one. Story-wise was here and there but you'll get confused when you start watching this part, so I recommend YOU to go back and watch the first one, just so you can have an idea what is what.
This part was only worth watching just for the main couple, witch is honestly my favourite for the last few months.
The side couple are all fine in their own way, but nothing special.
Many scenes are skippable. And definitely you'll notice the weird way of filming this drama, I have no idea why they did not stick with the original idea and continue from where it stopped.
First episode is a FULL SKIP
Second is a SKIP TOO
Start watching from the third episode and you'll be just fine.

---------------------EDIT------------------------
Sometimes I wonder, do I really support toxic relationships or the actors are just that good at what they are doing?
The answer is NO for both. Actually really enjoyed the "growth" of the main couple, but it got annoying the last few episodes.
The toxic part is just boring at this point, and the no communication trope is getting old. I understand that there are misunderstandings between the couples, but c'mon,20+ years old and still don't know that the key to a relationship is actually the communication beside all the cute and fluffy moments. I don't blame the actors, the writing sucks.
At this point I really don't see why you need to watch this show. If you are looking for cute actors, you got that, the story is boring, many dramas are having the same concept so nothing new, the writing is very bad, the way its filmed is honestly the some of the worst I've seen.
You can live without this drama. Don't waste your time watching this shit.