The two companies launched a showcase titled Baljunso World Wide Promotion in Hongdae on March 8 and it featured performances including HLIN, Love and Peace, and 015B's Jang Ho Il project band.
[2] Following the announcement, SM Entertainment assisted to debut Play the Siren in the music industry with their single album, Dream Drive in July.
[4] The song is addictive and powerful EDM sound with R&B genre, while the group's focus is hip hop and R&B, they work to combine different.
A teaser for their upcoming comeback Green Light was uploaded to YouTube on April 19, 2015, eight days prior to the official release.
With the departure of numerous members one by one—CJ, Squalla, ChiChi and ultimately Kasper—Play the Siren split up in August 2015.