The four artists from JTBC's singing program "Hidden Singer" made their debut as a group called The Hidden.

On September 19, The Hidden released their first single album, Us and prepared for an official debut as rookie singers.

The four singers were found through the program "Hidden Singer," a show in which the real singer is hidden and four others copy his voice trying to confuse the audience where the real singer is.

The Hidden members, Jino, U.K, Jeon Chul Min, and Yim Sung Hyun copied the voices of Shin Seung Hoon, Kim Bum Soo, Yoon Min Soo, and Cho Seung Mo.

The listeners are curious as to what their real voices will be like and what harmony the group will have together.

Their skills were already proven through the program, so now the only thing they have to prove is their collaboration.

Joo Young Hoon put the group together, after listening to them carefully as a panel judge for "Hidden Singer."