Titled "Happiness," this drama was anything but happy. It revolves around people turning into zombies following a post-COVID outbreak. The story takes place in an apartment building that is placed under quarantine after the residents become infected. As the days progress, the residents descend into madness, committing increasingly atrocious acts. The plot moves swiftly, and the actors' performances are outstanding; I found the villains utterly detestable.

Despite being misled—expecting a typical romantic drama due to the title—I thoroughly enjoyed watching it. Although there were only a few romantic moments between the main characters, I still found the drama very captivating.