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.
Who else was on No.X with Kim Jae-joong?
Kim I-na and Kim Tae-wan were responsible for the lyrics for certain songs on No.X.

Question: What album did he do after WWW?
Self-contained rewrite: What album did Kim Jae-joong do after WWW?