'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.

On this day's episode, previously Chun Song Yi drank wine that had poison in it due to Lee Jae Kyung's plot. Later when Chun Song Yi woke up at the hospital, she asked Do Min Joon to go somewhere where there were nobody. Do Min Joon took Chun Song Yi to an island using his supernatural powers to teleport. In the beach at night, Chun Song Yi asked Do Min Joon to sing for her. Do Min Joon sang the song "Promise" which was a song that was released in 1984, that the scriptwriter Park Ji Eun has chosen the song considering the relationship of the two.