Ji Ye-jun
About
Ji Ye-jun is the secondary protagonist of "'Til Debt Do Us Part." He wholeheartedly hates Soo-bin and loaned her a huge sum of money to put her in debt as apart of his revenge. Upon being forced to find a marriage partner, he proposes a deal with Soo-bin to marry him for one year to clear her debt and gain his step-fathers inheritance.
Ye-jun tries hard to stay firm to his hatred. but eventually develops feelings for Soo-bin.
Towards the end, he decides to end their fake marriage and become an actual married couple. He sets up a mock wedding, but unlike last time, it was filled with love. Soon after they become a real family and have a child.
(Source: tvtropes.org)