TWICE�have dropped more 'Signal' teaser images of Nayeon, Dahyun, and Sana.

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The JYP Entertainment�girl group are making a comeback with 'Signal' on May 15, and it looks like they're following an adorable, preppy concept with a theme around time. 'Signal' will include 6 tracks, including the title track of the same name produced by J.Y. Park.

Stay tuned for more TWICE teasers!