Vocal group Melody Day was the first to record the soundtrack for new drama "Hotel King".

Melody Day, who joined in support for "Hotel King", recorded "I'll Be Waiting", a heart-throbbing ballad song harmony sung by the three members.

"'I'll Be Waiting" features a full orchestra sound and sings of the wait after a breakup; the emotions of coldhearted hotelier Cha Jae Wan (played by Lee Dong Wook) for orphaned hotel heiress Ah Mo Ne (played by Lee Da Hae) is delicately expressed through the song.

Melody Day's "I'll Be Waiting" is produced by Minuki, who produced Zia's "Can You Hear Me", Seeya's "That Person Shoes III", and other songs.

"I'll Be Waiting" will be released through online music stores on April 25.