'You Who Came From The Stars' Do Min Joon confessed his love for Chun Song Yi in a song. On the nineteenth episode of the SBS Wednesday Thursday drama "You Who Came From The Stars" which aired on February 20, 2014, Do Min Joon sang Chun Song Yi a song called "Promise" by Im Byung Soo at her request.

In the beach at night, when there were only two people, Do Min Joon and Chun Song Yi, Do Min Joon sang for Chun Song Yi. The song "Promise" sang by Do Min Joon was a song that was released in 1984, and scriptwriter Park Ji Eun has chosen the song considering the relationship of the two. Music producer Jun Chang Yup of 'You Who Came From The Stars' said, "I told Kim Soo Hyun to sing the song to deliver Do Min Joon 's love for Chun Song Yi, not just to be good at singing. Kim Soo Hyun had the same thoughts as mine. He immersed himself into the charcter Do Min Joon and the scene was recorded very well."