The OST of SBS's Drama ‘The Chaser,’ which Kim Bum Soo took a part in, was released on an online music site on May 29.

The song ‘Callus,’ a ballad song with a sweet melody, was composed by Yun Il Sang and written by Yoon Sa Ra. This duo also wrote Kim Bum Soo's ‘I Miss You.’ In ‘Callus,’ Kim Bum Soo's singing ability is apparent as he sorrowfully sings the song.

In addition, the theme song ‘Lily’ was also released together with ‘Callus.’ ‘Lily’ was sung by Lee Hye In who plays the daughter of Baek Hong Suk (played by Song Hyun Ju). The song ‘Lily’ is a song to express Hong Suk's feelings toward his daughter.

Meanwhile, the first episode of ‘The Chaser’ was on May 28. The drama has captured the attention of the viewers with the solid acting of actors, including Son Hyun Joo, Kim Sang Joong, Kang Sin Il, Kim Sung Ryung, in the first episode.