Giuk

Now complete as five members, the band chose the name M. A. S 0094 to mean "Make A Sound" plus the birth years of their youngest ("2000") and eldest ("1994") members.

Giuk went by the stage name CyA. From May 2015, M. A.

S 0094 began busking together on the streets of Hongdae. He released his first single with M. A.

S 0094 on August 13, 2015, his self-written song "Butterfly, Find a Flower", and made his official debut with the band on August 2, 2016 on SBS MTV's The Show. On April 1, 2017, Giuk, with M. A.

S 0094, signed an exclusive artist contract with RBW and the bands' name was shortened to MAS. In October of the same year, Giuk auditioned alongside MAS for the survival show The Unit. He was eliminated in the 7th episode and ranked 59th place.

In June 2018, his band's name was changed again from MAS to ONEWE. He made his re-debut with ONEWE under RBW on May 13, 2019, with the digital single album "1/4". On March 9, 2023, Giuk announced he would no longer be going by the stage name CyA and would use his birth name Giuk for all official activities, both as ONEWE and solo.

Giuk made his solo debut on April 20, 2023 with the mini album Psycho Xybernetics : Turn Over. This was preceded by his first solo concert Prologue : Turn Over on April 8 and 9 and followed by his encore concert Epilogue : Turn Over on June 24. On October 6, it was announced that Giuk would be holding a solo concert Flight1112: Giuk (ONEWE) on November 11, 2023.

On November 1, a teaser was released announcing that Giuk would be making his solo comeback on November 15, 2023 with his second mini album Rise Waves.