It was revealed that charismatic actor Jang Geun Suk participated in singing three OST (soundtrack) songs for the highly anticipated upcoming KBS drama Mary Stayed Out All Night. Jang Geun Suk plays the role of Kang Moo Kyul, a handsome lead vocalist and guitarist for a rock band. Two of the three OST songs includes Request and My Bus! These two songs will portray Jang Geun Suk's drama character as a rocker who dreams of creating band music and illustrates his inner psychological conflicts. Jang Geun Suk commented on the songs, "For this drama I ended up singing three OST songs and the songs are all so good. I want to show the audience OST songs that go along well with the drama. Please love the OST as well as the drama." Mary Stayed Out All Night is scheduled to air for the first time on November 8th.