Firstly I must admit I am biased when it comes to the hunted house trope. I have an illogical love for it.

So when hunted house BL should be something almost custom made for it - it was just not it.

Acting
I saw a lot of worse acting, especially among newbies. So when it wasn't bad, the whole cast gave off a very BLAND feeling.
The show would improve with much more experienced casting choices.
Lead chemistry was also bland with nothing memorable to write about.

Story
The story itself with elements of Mystery / Thriller / Horror was only reason I finished watching this show.
I will not spoil it, but there were some interesting twists and turns. However, the execution itself was very mediocre.
The director was a newbie, so I don't think he understands how storytelling is supposed to work, especially when he mixed so many genres.
Peacing itself was also very problematic, he can't build momentum and atmosphere to make Horror/ Thriller elements to really work.

To sum it up the only thing I liked about this drama was the story, but the whole execution was a mess and could be done so much better.