2AM, with new style and a “monumental” teaser, is leaving fans questioning where this song is headed.

Will it sweep the nation, like 2PM led us to believe. With 2AM’s track record, it’s highly probable.

Anyway, check out the teaser for this unnamed song:

If the seriousness of the teaser has you yearning for 2AM’s cute and goofy side, then check out Section TV special on 2AM’s music video filming, with special guests 2PM. Also, you get to hear more of the mystery song.

Part 1: