The two first met in 2012 during the KBS Drama�drama "Sunshine Girl", and started dating afterward. Kim Hyung Jun fell for her kind, down-to-earth personality, and So Yi Hyun fell for his kind and humorous personality.

Another insider said, "The two of them started dating after 'Sunshine Girl' finished airing. Even during the�filming, they had great teamwork, so the staff all met up together. Back then, they were just noona-dongseng, but they matched each other well, so they always looked really close."

Yet another said, "The two became close fast because they were both interested in acting and because they had similar hobbies. They're so trusting in one another that they introduce each other to their friends. They broke up once during their relationship, but they got back together again because they couldn't forget each other. They both look amazing and their personality matches well as well, so it feels good to see them together."

Kim Hyung Jun's label said, "It's true that the two dated. But the label doesn't intrude onto his personal life much, so we don't know the details." However, So Yi Hyun's label was more careful and said, "It's true they did meet through 'Sunshine Girl', but we thought they were no longer meeting."