The first Tracks of the "K.Ballad Signature Project," involving singers Joy and Ha Dong Kyun, will be unveiled. The 'K Ballad Signature Project - Blue Night Song', which will be released through various online music sites on the 14th at 6 pm, is a lyrical Song that expresses the message to the nostalgic lover reminiscent of the blue night, It is a ballad Song expressed with emotion. This Song is a member of Red Velvet, who is loved by a clear and pure tone, and the harmony of Ha Dong Kyun, an authentic ballader who conveys a lonely sensibility with a husky voice. The duet of two unusual combinations adds to the emotional and ear-catching melody of the Song, adding to the freshness and faintness, and conveying memories and empathy to the listeners. Producer 'K.imazine', who planned this project, produced a number of Hit Songs such as Park Hye-won (HYNN) 'Like watering a withered flower' and Jia 'I do not want to love' at PJ Entertainment, a label founded by producer PJ of Ha Dong Kyun's representative Song 'Love her'. K.imazine, who created a lot of Hit Songs with his unique musical sense, hopes to catch the hearts of the public once again through 'Blue Night Song'.