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. Read more on Allkpop.