Secret duet? New concept in kpop! There is the wall between them so they can't see who is on the other side and when they talk in between their voice is distorted. They took secret part very seriously.
External Content
youtu.be
Content embedded from external sources will not be displayed without your consent.
Through the activation of external content, you agree that personal data may be transferred to third party platforms. We have provided more information on this in our privacy policy.
I think they did well!
and 
