The series is from 1theK's YouTube, and is a series of interviews where the artists talks about various keywords related to them. Yoon Hyun Sang talked about his music, how he became a singer-songwriter, and his love for the piano.

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IU joined him for the second half of the interview to talk about their duet, explaining that the two singers are not in love with each other, but missing their own loved one that left. IU also revealed that she had originally wanted the song for herself, and ultimately asked Yoon Hyun Sang if she could sing it as a duet with him. She also explained that she liked all of his songs and jokingly claimed that she tried to see if she could take them from him.

Check out the interview above with English subtitles!