The ending was left unexplained but we can surely conclude that both of the trouble teenager's are alive and still struggling to survive in this unfair world.
In the last 5 minutes we can see both Gyu-ri and Ji-soo escapes the building and what follows next is a pan shot of a city in South Korea.
In the last 5 minutes we can see both Gyu-ri and Ji-soo escapes the building and what follows next is a pan shot of a city in South Korea.