AOA are getting ready to drop their very first full-length album, 'Angel's Knock'! �That's a cute name. People would be rushin' to get the door at their arrival!

They released a teaser image each for two different tracks. �One is "Excuse Me," and the girls look like sweet and sexy Sherlocks in their trench-coat-inspired attire. �For "Bing Bing," they're sexy in a mature way, rocking mannish blazers that show how long their legs are.

Stay tuned for more!

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