I may be biased since Han Hyo Joo is one of my favourite Korean actresses and I'm a sucker for shows with great soundtracks/musicality. While I was initially hesitant to watch yet another zombie drama/movie ever since Train to Busan infected the Korean entertainment industry, this drama isn't actually about zombies. Surprise!
In this drama, the "zombification" personifies an individual's search for happiness. The more extrinsic one's road to happiness is, the more susceptible they are to the virus.
If you don't read too much into the symbolism though, this was a highly entertaining series to indulge in, simply for the impeccable chemistry between the two leads that built up throughout the series, the fantastic supporting cast and characters that added personality to what could've been "yet another zombie show", the anti-hero who made you question your own views on morality (although some parts of his character development confused me), the thrill and suspense that comes along with the genre, and of course the amazing soundtrack and bgm.
Overall, this drama certainly kept me intrigued from start to finish, and while some parts were predictable, it managed to present a fresh take on the "zombie" genre.