I started reading this series about a year ago, forgot about it, and then in a fit of spontaneity I remembered it and picked it up again. I've gotten up to the current scanlated chapters so far, and I like what I'm reading.
Gwisin Byeolgok is about a young not-so-typical girl named Ah-ryoung. What's not so typical about her is that she's a natural born medium who has seen, spoken with, and in some cases played with ghosts ever since she was little. One day, she finds a box under her bed, a box her father told her not to open until her fifteenth birthday. She opens the box and discovers an archaic hairpin with what appears to be a talisman of some sort tied around it. She undoes the mystery tag on her happy belated birthday present ... only to have a wily evil spirit invade her body... Yep, best present ever!
As it turns out, Ah-ryoung's mother formed a contract between Ah-ryoung and the ghost Nachal when she was still an infant. The deal was that on Ah-ryoung's sweet fifteen, Nachal would take possession of her body; a body that he wants very badly. He's going to be sent to Hell, and he needs a mortal body to fix that. It doesn't hurt that Ah-ryoung's body practically exudes yin energy, the source of energy for spirits. So now, poor Ah-ryoung has to contend with Nachal, among other spirits and the reapers of souls themselves for the right to live.
I'm not going to lie; this is a really typical shounen story. It has it all: the possible Mary Sue/ Gary Stu teenage lead, the supernatural forces out for aforementioned lead, ludicrously evil and irredeamable villains, and side characters, oh the side characters.
But despite all these nitpickings, I just can't not like it. I really enjoy reading this series; it's no masterpiece, but it has a certain appeal. You can find tropes and cliches like you wouldn't believe here, and yet it uses those well enough to compel the reader into reading a bit more.
Mabye it's good, mabye it's bad, mabye it's just average, I don't know. Hopefully I'll be able to develop a more in depth opinion as the series goes on. But so far I at least have a positive opinion on Gwisin Byeolgok.