Sex Toll (2012)

Sewoon shopping complex, the first to distribute porno tapes in Cheonghye-cheon!
The people's erotic stories started there.
The year was 1996.
Kyeong-tae filmed illegal tapes with porno actor Pan-sub at the Cheonggye-cheol Sewoon Shopping District when they meet Joo-ri who is about to go work in an adult establishment in Macao with a single porno movie. Kyeong-tae and Pan-sub get excited that they have the chance to win a big sum of money.
Kyeong-tae transfers a tape to Hyeong-soo who is their source of transporting their goods and dealer while he signs a deal while he signs a contract with all the money he had saved up until then without her knowing. Moneylender Soboro finds out and raids the shooting set and takes all of Kyeong-tae's money, demanding that he pays the rest within three days.
With the deadline for the signing of the contract and the three days come close, Kyeong-tae borrows money from Hyeong-soo and she gives him a Japanese version snuff-movie, offering him a deal.
He accepts it with no doubt but finds out he's been fooled and decides to become a member of a gang. Then he changes the prop knife on set into a real one...