JYJ member Jaejoong gains much attention after writing Baek Seung Heon's debut song.

Today, it was revealed that Jaejoong had composed Baek Seung Heon's debut album title song, "Until the Sun Comes Up."

Jaejoong was able to show off his composing skills through being given the opportunity to write Baek Seung Heon's debut song.

Jaejoong also was featured in Baek Seung Heon's music video and gained attention with his kiss scene with Kim Ji Won.

Baek Seung Heon released his debut album today along with the music video teaser.