Wonder Girls are coming back to the stage with a new album, titled "Why So Lonely."

JYP Entertainment has released a teaser image schedule leading up to the release date. First, teaser images will be released from June 26-29. Then, on July 1, the music video teaser will be uploaded.

After that, a track list will come out on July 4 at midnight, followed by a V App live premiere the following night. Finally, the music video and album will both be released on July 5 at midnight.

Wonder Girls will perform the song live for the first time on M Countdown on July 7. 

A week after that, they will release a dance practice video for the title song. 

So far, JYP has released four teaser images, one of each member. 

The title track, "Why So Lonely," is a regga pop track that was composed by members Sunmi and Hyerim, along with another composer, Hong Jisang.

Another song on the album, "To the beautiful You," was composed by Sunmi and features a retro 70s sound. This track was preleased on the vinyl version of the album.