I don't know where to start.
People say this series is underrated. Yes, it is. Most likely because of two things. First, the crazy BL fangirl plot is too cringy and annoying. Second, despite this series being a BL series (no doubt about that, it has many gay characters and relationships), the main couple is hetero. We all know that a lot of BL fans have an irrational aversion towards hetero couples.
So yeah ... To make it short: I wasn't happy with every development or every character, but this series was really smart and emotional. It got me invested into the characters, their feelings, their ambitions, their motives. That's very rare, honestly. I was watching it and trying to understand what they were thinking. Normally you know the characters, the plot developments are cliché, as a viewer you don't have to dig deep into their behavior and what they are saying. Not in this series, though. There were some pretty interesting dialogues, and overall this series had a very well written script.
Also, the music, the cinematography, the coloring, it was all great. Very great for such a small series.
I want to mention, like I have seen others already saying, that the main hetero couple was adorable. My favorite couple. I wasn't the biggest fan of the gay couples and their chemistry. But their story was very well told, very interesting, and made me really think about the characters.
So yeah, go watch it.
I'm so damn tired at the moment, but I forced myself to write this review. That's the least I can do. The series deserves the praise. The rating is too low.
On a sidenote: Stick with it, and try to not get too annoyed watching the first episode. If you make it through the first episode, the rest is pure greatness.