Overall, a good movie. Great Casting, especially loved Wi Ha-Joon's & Jin Ki-Joo's acting.
The jumpscares [especially the scenes inside Kyeong Mi's House] made the movie absolutely thrilling + the background Ost. [Atleast In my Opinion]

[☆Mini Rant as a review☆] [Spoilers Ahead!]

The story was good but I wish they gave Do Shik a more in-depth Back Story or at least gave him one. Do Shik [The Character] had a lot more potential than just dying in the end.
I wish they revealed more about his motive behind killing people... How he ended up like this... Why he's continuing in this path...

The Police Station Scene where The drunk man mentions his Family looked like it triggered him. Wish they make a Prequel movie on his Back Story.

Plus the Scene where Kyeong Mi rushes to explain to Do Shik about her Life Plans and him just listening to her ??‍?
Could have ended the movie at the part where he drags her away after that convo, allowing the audience to speculate on the ending, maybe even allowing them to create a part 2 movie that expands a bit more on the story.
I did like the plot twist ending but it wasn't exactly satisfying either.