Park Won-woo

Competitors are given elaborate masks to wear in order to conceal their identity, thus removing factors such as popularity, career and age that could lead to prejudiced voting. In the first round, a pair of competitors sing the same song, while in the second and third rounds they each sing a solo song. After the First Generation, the winner of the Third Round goes on to challenge the Mask King, and is either eliminated or replaces the previous Mask King through live voting. The identities of the singers are not revealed unless they have been eliminated.

A young woman struggles to pay the hospital bills of her vegetative husband. Despite her hard work, there's no hope for him to ever wake up, until an opportunity arises.

Five girlfriends who want to show off their boyfriend's singing skills play a bet to see who's the best singer. All couples are given game money to bet on the vocal stages each boyfriend performs. At each stage, judges vote on a dropout, and girlfriends have to bet on her own boyfriend or another's boyfriend to keep the money and win the prize.

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A moving duet performance by two singers with one wall seperating two voices a special story begins.