This is my first review of a drama I've seen. I have tbh, I'm usually too busy/lazy to take the time to do it. BUT... I'll make an exception for this one. Because the actors, producers and screenwriters should get some credits for this too.

Vibe:
I "briefly" dipped into the first episode and, after five hours of binge-watching, found myself completely emotionally overwhelmed on the couch with tissues and a glass of wine. And a big smile on my face.
This drama is a roller coaster of emotions. The episodes are quite short (around 15 minutes) and I cried, laughed, cringed, and felt second hand embarrassed in EVERY episode.
The chemistry between the actors was great (all four of them).

Actors:
It's a mystery to me how to "play" a cat and a dog, but if two can pull it off then definitely Seonghyuk (Milk) and Jaebin (Choco). Jaebin was such an adorable "doghuman", he played it very well and made me feel that he actually was a dog but in human form. Seonghyuk (despite being incredibly handsome *sigh*) managed to show a "typical" cat behavior without being weird.
Kudos to both.
Hojung (Jungwoo, the owner) was also very good. He embodied the character very pleasantly and managed to give the viewer the feeling that he treasured both of them equally. Seungbin (his boss) played his part of a cafe owner that is struggling but does not try to show it very well.

Plot:
I thought the idea was really good, so I started the drama. I found episodes 10 + 11 a bit rushed but that's unfortunately often the case in KDramas (BL) since you would have much more plot for a full drama but the production is usually shortened to a few.
But beware: Episode 10 you will only survive with at least three packs of tissues.

Entertainment value:
Fantastic. As I said I binged the drama straight away and loved every minute of it. I miss the four already (and it's not 24h ago that I finished it). Some reviews say that the audience cried endlessly in the drama.
YES, that is true. But somehow the balance was right. I did ball my eyes out every episode, but a minute later I smiled like an idiot. It never felt incredibly sad, it had sad moments that fit at that point but not ten episodes of despair ;-)

Rewatch?
YES. Even though you know the end of the drama now, it's just nice to see the story over and over again.

Notes:
For a Korean BL, the actors are VERY relaxed with each other during the kissing scenes. Not just one little kiss, but two uncharacteristically intimate kisses.

I hope this helped a little. I highly recommend everyone to see it. It was truly one of the best BL's I've seen in years!