It's not that bad but it could've been way better. The first episode starts off with the main character committing a crime recording himself and his rival having an affair. And that's weird per se. But then the story gets engaging and somehow (literally: how did it happen?) the two of them are in a relationship, without defining the nature of it.
I'm not bother about this lack of labels, I find that realistic to an extent. What bothers me is how the development feels rushed, without any breaking-points. It's a pity we couldn't see how they get close to each other, how they get to realize each other's feelings. Even if trivial, the storyline could've been showed much more better and even more meaningfully since the show touches so many interesting topics. The actors would be amazing showing a deeper meaning, or just in a well-done slow burn enemies-to-lovers serie.

In fact, the cast is so good. So good. I loved how Bank portraits Yai's sadness, also Mos' loving eyes in the romantic scenes are out of this world. I'll look forward for them to act in another drama together.

Thumbs up to the sound team too: the ost is incredible.