In June 2011, an image was leaked of SM Entertainment's itinerary for 2011 which included a release for a new single by CSJH. SM later confirmed that CSJH would be making a comeback with a new image. On 8 July 2011, CSJH's Dana & Sunday made a comeback as a sub-unit with a digital single titled 'One More Chance'; the single was released on 11 July.
