Super Junior-K.R.Y, established in November 2006, is the first Super Junior subgroup. It comprises members Kyuhyun, Ryeowook and Yesung, the most vocally influential members of Super Junior. Super Junior-K.R.Y specialize in performing mournful, R&B-style ballads.
The trio's first official performance was on November 5, 2006 on KBS's Music Bank, performing "The One I Love", theme song to the Korean television drama Hyena. Aside from the theme, they contributed to two more tracks in the original soundtrack of Hyena. The trio also performed in two additional original soundtracks, one track in both the soundtracks of Snow Flower and Billy Jean Look at Me. Unlike Super Junior's other sub-units, Super Junior-K.R.Y has not officially released an original single or album (but will release an album soon in 2012), and only participated in collaboration albums and original soundtracks.
Super Junior-K.R.Y held their first mini concert tour in Japan in August 2010. They held two more concerts in Kobe in November 2010 and another two concerts in December 2010 in Fukuoka. Over 22,000 attended the tour. (Quoted from Wikipedia)
and more tba