Keystone Entertainment (referred to as Keystone Entertainment) said on December 27th, "We will launch a 9-member boy group Keystone Boyz (tentative name) in the music industry in the first half of 2022."

In addition, on December 25th, Kim Tae-woo, the second member of Keystone Boyz, drew attention by releasing a Christmas carol cover video,  Because it is Christmas, showing off his high-quality singing skills. Kim Tae-woo is a former member of boy group 1THE9, born through the MBC audition program "Under Nineteen."

According to the timetable, Keystone Boyz will sequentially showcase their final debut members, group names, team logos, units, and complete photos for about two months, from January to early March. After that, it is expected to show the charm of Keystone Boyz in detail through a reality show.