Overall: the general comments below applies to a whole bunch of Korean BL. I'd say overall it's fine, but suffers from the same issues as other series. Watched on Viki (minor spoilers)

Content Warnings: murders (off screen), suicide, dub con kiss (sleeping)

What I Liked
- good production value
- the flashbacks were obvious
- I thought Yeon Seok's personality (with his confidence/big ego) was funny in the beginning
- the cat magical creature pretty much declares she is asexual, I appreciate the representation and I wish this character was more fully developed
- that both Sin Bi and Ha Yeon called Yeon Seok for being a jerk because he was a jerk

Room For Improvement
- choppy/rushed, I didn't really understand/buy into the sudden shift with Yeon Seok's feelings
- cliche poor communication at the end and Ha Yeon being angry at Yeon Seok when Yeon Seok is doing exactly what Ha Yeon asked him to do (eyeroll)
- pointless love triangle, that screen time could have gone to developing the m/m romance and/or fleshing out the cat goddess character
- the kissing was okay but not great
- why did Ha Yeon get killed the second time, we just never know???