With about 508,000 test takers taking the CSAT this year, idol stars are also preparing for the CSAT ahead of college entrance.

Many of the idol group members born in 2004 are taking the CSAT this year.

Seo Young-eun and Huening Ba-hee of Kepple, Lee Jae-hee of Weekly, Amin and Baek Seung of Apex, Lee Jin-woo of Ghost Nine, Nam Do-hyun of BAE173, Harry Jun of Darkbee, and Jung of Atbo will challenge the college entrance exam this year.

Some idols do not take the CSAT to focus on their activities.

Ive's Jang Won-young and Liz, Lucy and Min-seo of the group woo!ah!, as well as StayC's Yoon-sun Jae-yi, TREASURE's Park Jung-woo, ENHYPEN's Jung-won, and MCND's Win will not take the CSAT.