First of all, I'm so happy there is such a lovable group of friends, they all have there own personality and not just labelled as "friends with...". The two girls especially: Yihwa and Fai were really great and I like them so much, they are intelligent, especially Yihwa wich really is a cupid, you don't want to mess up with them. Finally some likeable girls in a BL (I know it's not the first ones but they really are useful to the story and not just funny).
Also, the vilain was really a threat but also manipulative with everyone, I personally liked here very much because she wasn't just the "annoying ex" but had so many tricks up her sleeve and she controlled her minions like a mob boss which was fun and intriguing to watch because at some point, Yihwa and Plan was just in a mind game XD.
To me, this series have the most interesting and well developed characters of all the BL's I've seen and the plot is interesting too.
Even though Knock could be annoying sometimes because so selfish with Korn, we could feel the passion between them and the actors were not afraid to touch each other which was more natural.

Flaws:
I felt bed for Farm all along his toxic relationship with the doctor wich really is a creep and was happy when he stopped it but this relation made him evolve in the wrong way for me because he was hurt so much and traumatized.
And like if one abuse wasn't that much, he also was forced by his girlfriend... I hated the fact it was treated to be fun to watch! The music was too lively for this subject, it is not normal.
(Plus the heterosexual relation was uninteresting and I didn't like Korn's sister's character )