I've watched the original Korean drama years ago and at the time I liked it, it had a good premise and the plot and acting didn't disappoint for what it was worth, however there were a few things that lacked with the cast chosen, for starters the main leads age difference there was a hindrance in the whole romantic plot. It felt cringe, weird or forced in some parts, while other flowed naturally. Still Soohyun was a minor at the time, so it wasn't well received.
And yet here we have a minor difference with the age of the leads, and Off and Jeen's relationship and chemistry is better.
Now I have only seen Saint in BL roles, and I must say this was quite pleasant to watch.
He did a great job as the main lead, and I like the female lead Jeen more in this version too.
The ghosts and demons have a better execution too, and worthy effects throughout the drama.
It's darker than the original from what I can remember.
Leng and Junior being those two goofs, were fit for the comedy part of the plot in between all the horror and action.
Music wise once again nothing out of the ordinary for me, well executed on the right moments, although I did like the intro they made for this series.
Definitely worth to watch or re-watch if you have seen the Korean version already, a few things you will find the same but with certain intriguing twists, others will feel brand new, either way, Off and Jeen's many moments will put a smile on your face ;)