ARGON (아르곤) is a six-member boy group under MSH Entertainment. They debuted on March 11, 2019 with their first single album "Master Key".
ARGON opened their social media accounts in May 2018 and revealed the first member to be Kain on November 19, 2018 followed by the second member Haneul on November 20, third member Roel on November 21, Yeoun and Jaeun on November 22, and the final member Gon on November 23.
- "Master Key" (2019)
- Jaeun was a former member of INX under the stage name Win.
- The members used personal Instagram accounts to communicate with their fans. On November 18 and 29, they all announced across social media that they will no longer use their personal accounts but will communicate from the group's official accounts instead.