Could have been drag more and more until an unexpected ending

Rating: 8/10 (1 November 2019)

Slow burn, gripping, tension and feeling uneasy while watching. Best performance by Kim, his father Mr. Park and their family. And the other family mother is also. And everyone in this movie did their best in acting. This story can be dragged more and more. Than we could watch a better ending. I think, here the makers should have to do more research about the ending. Otherwise a solid screenplay and story.
It's all about class difference or class inequality.
It's all about greed.
It's all about karma - Tit for tat.