The promising girl group LOO?? is back with the three unveiled members, HyunJin, HeeJin, and HaSeul, singing a Christmas-themed song, "The Carol," together and most recently unveiled member HaSeul lending her sweet vocals to "Let Me In."

"The Carol" starts off slow and sentimental then gradually grows more upbeat, perfect for a holiday party!  On the other hand, "Let Me In" captures the sweet sentimentality of the winter season while HaSeul sings with her delicate, gentle voice.

Listen to both!