Hoverlab, a South Korean news commentary site on YouTube, claimed that the actor and the late actress Kim Sae-ron had been in a six-year relationship since she was 15 years old.

Kim Soo Hyun's agency has finally addressed the rumours about his relationship with late Korean actress Kim Sae-ron.After the death of the High School Love On star’s in February, some pictures and letters surfaced on the internet

Kim Sae Ron and Kim Soo Hyun have been in headlines for their alleged relationship when the actress Kim Sae Ron was a minor and the actor Kim Soo Hyun was 27 years old. These headlines started since the actress Kim Sae Ron was found dead at her residence on Kim Soo Hyun's birthday and the pictures of them circulating all over the internet.