Oh Hye Rin, better known by her stage name Raina, is a South Korean singer. She is the former main vocalist of South Korean girl group After School and also the former leader of After School sub-unit 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".
(Source: Wikipedia)