Conversation so far:
What was the line up changes South Korean group Kara faced?
South Korean group Kara Members Nicole Jung and Kang Ji-young officially departed from the group in 2014, while Kim Sung-hee left in 2008.
Why did Kang Ji-young leave the group Kara?
Kang Ji-young left South Korean group Kara because her contract was expiring and to puruse her other dreams.
Who was Kang Ji-young eplaced with?
South Korean group Kara member Kang Ji-young was replaced with Youngji.
What were the names of the two new members of Kara?
The two new members of South Korean group Kara are Younji and Hara.

Question: What is Rock U
Self-contained rewrite: What is Rock U by Kara?