One of Kang Seungyoon's title songs written by G-Dragon Posted by vic on July 23, 2013

From YG Life:

How many title songs will KANG SEUNG YOON release?

LEE HI, who made a debut early this year, released 3 title songs and music videos “1,2,3,4”, “IT’S OVER”, and “ROSE” from her first album and made TV appearances with those songs. We are planning to do the same for KANG SEUNG YOON and release 3 title songs.

In a nutshell, after releasing “WILD AND YOUNG” on July 31, he will be releasing two other title songs, each in August and September.

Source : bigbangupdates[dot]com