Conversation so far:
Did Kim Jae-joong release any solo albums?
WWW is the first solo studio album recorded by South Korean singer Kim Jaejoong.
When did Kim Jae-joong release his first solo EP?
I was released on 17 January 2013 and is composed of rock songs, two of which were composed by Kim Ba-da from the rock band Sinawe.
What was the name of Kim Jae-joong's next album?
No.X is the second studio album by South-Korean singer Kim Jae-joong, released on 12 February 2016.

Question: Who else was on this album with him?
Self-contained rewrite: Who else was on No.X with Kim Jae-joong?