Two audio teasers of tracks from the upcoming album were released through Red Velvet's official Instagram.
Image teasers of Yeri and Irene were released as it was also reported that the members have finished shooting their music video.
Girl's Day previously had a comeback in July 2015, nearly eight months ago.
Yang Hyun Suk also talked about why the singer's latest album is being split into two parts.
YG also shared the release date for the duo's next album.
According to insiders, the title track has already been selected.
The group has already finished filming their comeback music video hinting their return to the stage is sooner than expected.
The date was announced at the end of the most recent episode of K-pop Star.
Jessica's agency responded to the intial rumors that said Jessica is working on an album and preparing a comeback.
The rewards range from a simple thank you email to an exclusive Seoul day trip with the members of Tahiti.
The 12-member girl group have released a massive amount of teasers and information ahead of their first album release.
The Epik High frontman revealed the album title through a tweet to his fans.
The SHINee member's first full-length album will contain 10 tracks.