Unlike the title, this drama isn't about happiness but the struggle to survive an outbreak. At first I thought it was quite boring, the first few minutes didn't really intrigue me much. But as the drama progresses, I see so much intense scenes and thrilling moments. I had a lot of jump scares in between, I don't know, maybe because I became weak hearted lol. I also like how both the leads were strong and independent on their own, specially because I know none of them will be like "nO jUsT LeAvE mE aLoNe I'm GoNnA dIE aNyWaY", in short, I really like their strong character. The other characters too were interesting, which makes me feel annoyed toward towards them like most of the time. The actors did great in their respective roles. However, I feel like the ending was too short to my liking or because I didn't get to see how others were doing. Overall, it was a good watch and would really love to see the season 2 if there would be one.