Deekay wrote for what South Korean girl group formed by S.M. Entertainment?
Red Velvet (band) Red Velvet (Hangul: 레드벨벳) is a South Korean girl group formed by S.M. Entertainment. The group debuted on August 1, 2014, with their digital single "Happiness" and with four members: Irene, Seulgi, Wendy and Joy. In March 2015, Red Velvet added a fifth member, Yeri, to the group.
Yoon Chae-kyung Yoon Chae-kyung (born July 7, 1996), is a South Korean singer and actress. She originally debuted in 2012 as a member of Japan-based South Korean girl-group Puretty under DSP Media. She is also known as a contestant of "Kara Project" (2014) and "Produce 101" (2016).