Before we start, yes there are indeed similarities between GFN and this drama however at the same they are quite different from one another in terms of plot. Each episode is a continuous storyline so not to worry about having a different plot in each episode.

Story;
The story.., ah how to describe, I wouldn't say predictable but for me it lacked a little something but that's just my preference maybe because I have watched a lot of thrillers. Some scenes are creepy but nothing too heavy or any jump scares so don't be scared! It did feel very short though I hope they added some elements into it because It did make me want to watch the next episode immediately.

Acting;
Loved it. Nothing too much or unnatural, everyone played their part well.

Music;
I FUCKING LOVED THE TRACK
Incase anyone needs it, its 断面 by Dios.

Overall, just go for it. Its just 23 mins long, 7 episodes; good for a late night watch if you're bored.