Boys Whose Ages End in Nine) is a 2014 South Korean television series starring Kim Young-kwang, Yook Sung-jae, Oh Jung-se and Choi Ro-woon.

But his fall from grace occurs when members of an indie band he'd cast drop their pants onstage and flash the entire country during a live broadcast (based on a real-life incident on MBC in 2005[2][3][4]).

Kwang-soo often thinks about "the one who got away," his ex-girlfriend Joo Da-in who left him heartbroken when she suddenly broke up with him one day after publicly rejecting his marriage proposal.

When they meet again, Da-in is a single mother whose life revolves around her young daughter Eun-seo, and they've just moved into the apartment one floor above Kwang-soo's.

Jin-gu almost confesses his romantic feelings for his friend and co-worker Ma Se-young, who's from a small town, is outspoken and rough around the edges but very loyal.

Dong-gu suddenly feels threatened when during a movie audition, he loses the role to a new rival child actor named Do Min-joon.