B1A4 has participated in the OST for SBS's new drama, 'Take Care of Us, Captain'. The boys were given the opportunity to sing its main title track, a position not often given to rookie idol groups. Producers felt that B1A4 would fit admirably, and so they gave them the song 'Sky', which airs with the drama's pilot episode on January 4th. Co-produced by composer Jo Min Sung and director Louie (who's�known for his work with the 'Sungkyunkwan Scandal' OST), 'Sky' creates a synergistic effect with B1A4's sweet voices and the drama's sky high theme. Producers stated, "Right from the production stage of the drama, B1A4 was considered for the OST. We had a lot of anticipation for them and we're sure that their sweet but powerful voices will create a great musical effect on the drama." Check it out below!