SECRET (시크릿 in Korean) was a South Korean K-pop girl-group formed by TS Entertainment in 2009. Originally, the group debuted with four members, including Jun Hyo-seong, Jung Ha-na, Song Ji-eun, and Han Sun-hwa.
Here is the song that was sung by SECRET for the soundtrack of an anime.
- Twinkle Twinkle for Naruto SD in 2012
MBLAQ (Music Boys Live in Absolute Quality) is a South Korean boy-group created by South Korean entertainer Rain, under J. Tune Camp. The group consists of Seungho, G.O, and Mir, and formerly included Lee Joon and Thunder.
Here is the song that MBLAQ did for an anime soundtrack.
- Baby U! for Beelzebub in 2011
J-Min, or Oh Ji-min, is a South Korean singer, songwriter, and musical actress. She began her career in Japan before eventually debuting in South Korea. She was born in Seoul, South Korea on May 27, 1988.
Here is the song that J-Min sang for an anime soundtrack.
- Change for Hanasakeru Seishounen in 2009
SS501 s a South Korean boy-band consisting of five members: Kim Hyun-joong, Heo Young-saeng, Kim Kyu-jong, Park Jung-min, and Kim Hyung-jun.
Here is the song that SS501 sang for an anime soundtrack.
- Kokoro for Blue Dragon in 2007
U-Kiss a South Korean idol boy-group formed by NH Media in 2008. Their name is an acronym, standing for Ubiquitous Korean International Idol Super Star. The group’s current lineup is composed of Soohyun, Hoon, and Jun.
Here is the song that became an anime soundtrack from U-Kiss.
- Dear My Friend for Arashi no Yoru ni Himitsu no Tomodachi in 2012