I enjoyed watching this drama. It is suitable for those around the ages of around 12 and up. The drama setting is a school, and it doesn't have any foul language or situations that would be considered unsuitable for the younger crowd. It does have some fighting but it's honestly more exhibition style fighting than actual violence.

The show is based on Yu Na and her new-found friends, working together to retrieve the 7 phantoms that have been released into the world. The phantoms are basically the embodiment of human sins or emotions, such as greed, fear, anger, etc., which take over their classmates one by one. It has to show itself in order for them find and capture it. There is a question as to why they were released in the first place, and whether the good guys are actually the good guys, but it's obviously left open for another season to answer those questions.

It was pretty simplistic and easy to watch. Of course there were plot holes, but I think the writers were trying hard to fill in the major ones without giving the entire story away in the first season. The interaction between the characters was good, and there weren't any cringe moments, which is always a plus. I saw in the comments where people were talking about how cringey some situations were, but I didn't have that reaction anywhere in the show. I just thought it was cute, and I was happy for a break from the angst, lack of communication, and Drama (with a capital D) of other shows.

I am looking forward to season 2....mostly because I want to know if that one-sided crush gets resolved. =)