I finished the series in the span of 3 days. While the plot was very disappointing, the romance was what kept me watching until the very end. The love story between the two main characters also takes up the majority of the series, way more than the plot, so I believe it's enough to make the rating higher overall.

Starting from the plot: it's definitely the weakest part of the series. It's supposed to be about the son of a mafia boss, but to be honest I kept forgetting about it - the characters only seemed a bunch of rich people who use guns from time to time. It's never clear what are Nuengdiao or Palm's feelings about this "business" either, whether they don't believe it's a big deal or they're just convinced that they're "the good mafia". Another reason why it was hard to keep in mind the "mafia" aspect of the story was the complete lack of organization and proper use of resources in the group: where are the bodyguards? Where are the security systems? This sloppy depiction and lack of care for the theme forced me to suspend my disbelief in front of several situations.
The plot itself suffers from a similar problem: it was neglected to the point that it looks more like a draft. There were many situations that could have been easily solved or avoided based on the premises, but they just happen anyway, which made the story frustrating to keep up with. There are even instances where the characters seem to actively avoid solving the problems just to let the story last longer. The events were extremely predictable, so the lack of proper action and the plot holes did nothing but annoy me even more.

The romance, on the other hand, was very fun and sweet. I liked how Nuengdiao and Palm started off with a rather cold relationship forced by their circumstances, but then gradually warmed up to each other. The main conflict for them was about their feelings getting in the way of their duty and vice-versa, and seeing this theme being used so thoroughly was a joy for me! I really like the bodyguard trope and I was hoping for something like this. Both Palm and Nuengdiao are far from being perfect: they make mistakes and hurt each other, but it's all backed up by their inner conflicts, fears, and desires, so nothing ever felt out of place for either of them.
The relationships between characters overall were well detailed too. Ben and Chopper in particular have their own inner conflicts and desires and they're all portrayed properly on the screen, but Nueng and Palm's parents were also great characters in their own right. The acting was pretty good, but I especially enjoyed the performances from Phuwin and Perth.

In conclusion, I believe that one might like or dislike this series based on what do they look for in a BL. If you're looking for an interesting and well-written plot, then this is absolutely not for you. If you're looking for a romantic love story with some action sprinkled in, then this might be just right!