I personally watched this because I am a fan of GFriend. Didn't expect much, to be honest. However, it was generally good but of course there are downsides for me. Feels a bit rushed. Many unanswered questions. Personally, I think it would have been explained better if this was a series, unless otherwise there's potential plans for a second movie. Lastly, as a person who avoids horror movies very much and is SUPER scared of them, I recommend this one. If you get through the half of the movie, it will not be that scary and you'll also start to anticipate more.