Ahead of the release of her first full-length album 'BLISS', D.O. has raised fans' expectations by releasing the first music video teaser for the title song 'SING ALONG!'.

In particular, a portion of the title song 'SING ALONG!' was released along with the teaser video, and the lyrics 'Make Sing Along' were added to the upbeat rhythm and addictive melody, greatly increasing expectations for the full song.

Meanwhile, D.O.'s first full-length album 'BLISS' will be released on July 7th at 6 PM through various online music sites.