This is one of the few animes that right off the bat I will say, don't watch this unless you read the manhwa. The reason for this is that some necessary background to make this anime enjoyable is omitted and can only be found in the manhwa. Another failing point of the anime is that it doesn't have the same pacing or character development that the manhwa does, it feels less plot driven than it's source material. That being said, apart from the content added for the anime version the plot is astoundingly high quality for this genre, the CGI is well done and the anime sticks very close to the manhwa. A few notes on how to make this a more enjoyable experience:
* skip the extra fanservice added by the anime it feels forced and makes things less enjoyable.
* read the manhwa first, specifically vol. 7 - 14 which this season covers, this anime can be a bit fast paced and confusing otherwise.