Roots of Hyuna

SS501 is a South Korean boy band that was formed under the management of DSP Media. The group debuted on June 8, 2005, with five members: Kim Hyun-joong, Heo Young-saeng, Kim Kyu-jong, Park Jung-min and Kim Hyung-jun. They debuted in 2005 with the EP Warning, which included their first number one song, "Never Again". In 2007, SS501 entered the Japanese market with the maxi single Kokoro, which debuted at number five on the Oricon chart. The following year, in 2008, they became the first South Korean artists to win the award for Best New Artist at the Japan Gold Disc Awards. SS501 has released two studio albums and seven EPs in Korean, and two studio albums and three EPs in Japanese.

Son Ga-in, known mononymously as Gain, is a South Korean singer, actress and entertainer, best known as a member of the South Korean girl group Brown Eyed Girls. Having debuted with her home group earlier in 2006, Gain eventually made her solo debut in October 2010 with Step 2/4 to great commercial success, and has since released a total of six extended plays. In addition to her musical career, the singer also appeared in several native programs and series, most notably We Got Married and All My Love for You, where she co-starred alongside 2AM's Jo Kwon.