Decided to watch because of main actor, saw him in Manner of Death and liked him.

It was fine and entertaining until the main leads got together, after that it was just a a big pile of mess and no romance at all.

The story became quite confusing and a lot happened at the same time.

There were rarely any romantic scenes between the leads. The few kiss scenes were very poor. Which is pretty bad considering this is a romantic drama. I didn't feel any chemistry between the leads either. I actually became more interested in the romance between the boys.
I watch dramas without romance, it's not because of that. But with this one, i expected more in that aspect.

The acting was decent, but it could've been better.

If it's worth watching? It depends on what you're looking for.
If you don't mind weak romance in romance dramas, then go ahead. It's good if you want to watch for the story, gets kinda confusing, but that was for me, maybe you will understand better.