M Signal is from FNC Music who consists of 2 members Jun Geun Hwa and Kyun Woo. They worked in music ever since 2005 but it was mostly work that didn’t catch the attention of the mainstream, and now they’re making their debut under a major label.
They started getting attention after contributing to 2011 Korean drama "Heartstrings" OST. The track title is “I Guess You Don’t Know”, it was included in OST series Part 4.
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