While it's impossible to definitively say a PD "matched" anyone, there are instances where K-drama pairings have led to real-life romances and even marriages. It's important to note that these relationships developed organically, and it's unlikely that a PD "orchestrated" them. However, the on-screen chemistry fostered by the PDs and writers certainly played a role in the actors' real-life connections :
Hyun Bin and Son Ye-jin:
Their on-screen chemistry in the drama Crash Landing on You was undeniable, and they eventually confirmed they were dating in real life. They later married and have a child.
Song Joong-ki and Song Hye-kyo:
Their roles in Descendants of the Sun captivated audiences, and their on-screen romance translated into a real-life marriage that unfortunately ended in divorce.