Honestly, this was a long watch, I kept getting bored.
It was very sweet and JaFirst have amazing chemistry, as do the two who played the side couple.
But it was just very second hand embarrassment worthy - Pun was scarily obsessive over the actor and also very childish, the last few episodes were tough as it was just him sulking while Ashi was trying his hardest to apologise (I counted at least 3 or 4 attempts).
It was hard watching Ja in this role, in DSN he was brilliant and playing a caring mature character really suits him, so him playing a younger, socially awkward character was a bit hard to watch and he couldn't show much of his skill set. It was also a bit strange that he acted like that the whole time EXCEPT in the NC scenes - his awkwardness suddenly left and he acted like he did in DSN. First was brilliant in his role of Ashi though. He was so good at showing his confusion, sadness, love etc. You can really see the chemistry that he has with Ja and made me really like Ashi as a character.
The rest of the time the villains were annoying and unrealistic- the entire show was really about the feud between the two agents, and Title was just creepy - the whole thing with Ban was never really addressed either it had a big build up then 'oh yeah he's been arrested' and never mentioned again.
Despite the shifty start (Muang was slightly obsessive after the one night stand) and dubious consent for drunken night no.2, Muang and Ning honestly kept me watching, they were cute, the mature scenes were very well acted and it was quite a realistic relationship.
All in all, it wasn't awful? But the story was pretty boring and lots of characters were annoying. I just watched it for the side couple and JaFirst tbh.