They don't have any intentions of going public with their relationship, though.
When a reporter asked if she was in a relationship, Shin Hye replied that she was in a secret one." - The next best reply is an analyzation of two songs that they wrote the lyrics for.
At the Baeksang Awards ceremony, Yonghwa smiled and pointed towards Shin Hye with his finger while singing the line, "Because I love you, and because only you know".(Korean: 사랑이 LARGE, Starring: Kim Minkyeong, Yu Minsang, Im Uil, Song Byeongcheol → Kim Hoekyeong) To this couple, what could be more important than food, even when they are facing a break-up? Aug.2016, actor Shim Hyeongtak appeared on the skit as a guest.(Korean: 세젤예 (세상에서 제일 예민한 사람들), Starring: Yu Minsang, Song Jungeun, Lee Suji, Im Uil | Previous appearances: Song Wangho, Kim Seunghye) Waiter Yu Minsang and his encounters with various overly-sensitive patrons.) is a Korean sketch-comedy TV show on KBS 2TV network.It began airing in September 1999 and is the oldest of South Korea current comedy programs.