Kim Soo Hyun and Kim Sae Ron were in a relationship. However, the former actor’s agency denied alleged involvement in Kim Sae Ron’s financial struggle and death.

Ron's mother countered the claims through Garosero Research Institute, made by Kim Soo-Hyun's agency Gold Medalist including the love letters sent to her daughter, which were described as being sent by a "close friend.

After confirming that they were in a relationship, Kim Soo-hyun refuted the allegations that he dismissed Kim Sae-ron’s call for help over a debt connected to a drunk driving incident (DUI) that the late actress was involved in.