Sweet 18

The idea of arranged marriages seems ridiculous, especially for young people who are far from tradition. It all starts when the head of the Kwon family decides to marry his friend's family, and they make promises to each other that when the granddaughter of the Yun family reaches adulthood, she will become the wife of the heir of the Kwon family. Unfortunately, they were unable to keep their promises because the Yun family had to leave their home due to financial difficulties.