There is no doubt that this is a "psychic" series, suspenseful and violent (you need to have a high level of concentration to understand the small nuances). The series gives a glimpse into the dark side of the era of artificial intelligence (AI), and the abuse of dating sites. A glimpse into the difficulty of Asperger's diagnosed people to read social and environmental situations. It has some social messages, concerning the question of what is relative morality.
The casting is perfect, the acting of all the actors is professional and perfect +++.
Clearly erotic scenes that are not typical of Korean series (I don't know how the actors stood it during filming, haha)
There were scenes that were borderline illogical (in my eyes) that damaged the credibility of the plot, this is not a fantasy series, the plot is based on reality and therefore it bothered me personally.