I have watched many Korean apocalypse movies, dramas and series. Happiness wasn't any different to be honest. I was eager to see Park Hyung Shik's acting as he is one of my favourite actors. He did good but I didn't like the female lead's acting, She was showing too much macho character. It wouldn't be that noticeable but because this is a zombie movie, you'll find her character too careless. Overall acting was good, it's worth to watch but the story isn't any different from typical zombie movie. I have just watched first six episodes, they were nice but it didn't keep me up to my toes.