Oh Hye-rin (hangul: 오혜린; hanja: 吳慧潾; born May 7, 1989), better known by her stage name Raina, is a South Korean singer-songwriter. She is the former main vocalist of South Korean girl group After School and also the former leader of After School sub-unit AFTERSCHOOL BLUE and Orange Caramel. Raina debuted with the group in November 2009 following the release of the group’s third single, “Because Of You”. She debuted as a solo singer in September 2014 with the single “You End, And Me”.