Girls is the debut Japanese extended play by EXO-CBX, the first official sub-unit of the South Korean boy group EXO. It will be released on May 24, 2017 by Avex Trax. The EP will feature seven tracks in total including the Japanese version of their debut Korean single Hey Mama! and a bonus track that will be included only in the first edition of the album.

On March 10, 2017, it was revealed via a livestream that the EXO-CBX would have their Japan debut later that year, sometime in May.On April 1, 2017 it was announced that EXO-CBX will release a Japanese EP entitled Girls on May 24, 2017.On April 26, It was revealed that the mini album will be released in four versions, CBX, Chen, Baekhyun, and Xiumin versions. The track list of the extended play were released also on the same day. On April 28, a teaser of the title track "Ka-CHING!" was released. It was revealed that the song will be used as an ending theme for the "Nihon Terebi" show. On May 1, a short music video of the title track "Ka-CHING!" was released. Two additional, group teaser images also were released on the same day.

The special edition (Only available for EXO-L Japan) version of "Girls" was sold out in less than an hour upon its release, making the sub-group the fastest selling K-pop group in Japan, breaking EXO's record.

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