SUPER JUNIOR

That concept, however, faced opposition after the fans got attached to the group's current members. Only one member, Kyuhyun, was added before the concept was dropped, and the group, changing its name to simply SUPER JUNIOR, became a group with a fixed number of members. The digital single "U", released on June 7, 2006, was the first release Kyuhyun participated in.

Its title track, "U", also gave the group their first music show win. They went on to win four more times, for a total of five wins. On August 10, 2006, Heechul sustained injuries after being involved in a car accident and had to have metal rods implanted in his leg.

He had to rest for about six months. Though the injury never fully healed and he experiences chronic pain in his ankle, he continued participating in stage performances and concerts for a few years. However, after his leg's condition worsened around 2013, 2014, he started to participate less in activities like music show performances and to sit out live performances when necessary.

Accomodations like getting a smaller part in the choreography or being only at the end of songs were also made. SUPER JUNIOR's first sub-unit, SUPER JUNIOR-K. R.

Y. , composed of Kyuhyun, Ryeowook and Yesung, made their debut on November 25, 2006, performing "The One I Love" on Music Bank. They are credited as the first official sub-unit of k-pop.

SUPER JUNIOR's second sub-unit, SUPER JUNIOR-T, composed of Leeteuk, Heechul, Kangin, Shindong, Sungmin and Eunhyuk, made their debut with the trot single album "Rokkugo!!! " on February 23. On April 19, Leeteuk, Shindong, Eunhyuk and Kyuhyun and two of the group's managers were riding in SUPER JUNIOR's van when they were involved in an accident.

All four members sustained injuries - though Shindong's and Eunhyuk's were superficial -, and Leeteuk and Kyuhyun had to be hospitalized. The latter was in a critical state, but he eventually recovered, though he was absent from group activities for four to five months. The group's second studio album Don't Don was released on September 20.

Its title track, with heavy metal sounds, contained lyrics criticizing society. The live album of the tour, The 1st Asia Tour Concert Album 'Super Show, was released on May 19. The third sub-unit of the group, SUPER JUNIOR-M, debuted during the tour, on April 23, with their first album Me.

The sub-unit, whose releases are in Mandarin, was created in order to promote in China, and it contains two members, Zhoumi and Henry, that are not part of SUPER JUNIOR itself, as well as the SUPER JUNIOR members Hangeng, Siwon, Donghae, Ryeowook and Kyuhyun. (Eunhyuk and Sungmin were added to the unit in 2011 for the promotions of Perfection after Hangeng's departure. ) The group's fourth sub-unit, SUPER JUNIOR-Happy, composed of Leeteuk, Yesung, Kangin, Shindong, Sungmin and Eunhyuk, debuted on June 5 with the mini-album Cooking?

Cooking!. SUPER JUNIOR made their Japanese debut on July 9, with the special single "U / Twins". In August, they won the Favorite Artist Korea award at the MTV Asia Awards.

On November 26, they released a second Japanese single, "Marry U". The group completed their first Asia tour after having performed a total of ten shows in South Korea, Thailand and China, with the last one being on March ...