Red Velvet has released a mysterious new teaser.

In this post, the SM girl group hints at a potential new track titled "Sweet Dreams." This song seems to be part of a special album package for their latest 7th mini-album, 'Cosmic.'

The album's packaging resembles a plushie doll box, and some fans speculate that the doll might play the songs when a button is pressed.

Check out the teaser below. This new release is set for August 1 at 6 PM KST.

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