In February, Mnet's new digital channel 'M2' launched a message-in-a-bottle themed relay dance challenge, and rookie girl group TWICE was the first to be featured.

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At the end of their challenge, TWICE appointed Seventeen as the next group to be targeted, and the boys have finally responded with a relay dance medley of their own!

In the clip, the boys of Seventeen cover TWICE, A Pink, Rainbow, Red Velvet, and After School with overflowing energy and vigor! According to the rules of the game, a group who receives a "message" must cover a dance (or multiple), and then target the next group for the following round.

Seventeen's next target is Rainbow! Will the girls of Rainbow accept the message? Stay tuned to find out!