“How to Be Thirty” will be a relatable romance centering around the work and love lives of women who have just entered their 30s. The drama follows the story that unfolds when 30-year-old webtoon author Seo Ji Won meets her publisher Lee Seung Yoo, who is also her first love from middle school.

Jung In-sun
Seo Ji-won

Hani
Lee Ran-joo

Cha Min-jee
Hong Ah Young

Kang Min-hyuk
Lee Seung-yoo

Song Jae-rim
Cha Do-hoon

Baek Sung-chul
Hyung Joon-young

Lee Chae-won
Yoon Sun-Mi

Kim Ji-sung
Lee Hye-Ryeong

Kim Min
Ms. Jung [radio program staff]
My Dearest Nemesis80%
At a Distance, Spring is Green75%
The Tale of Nokdu70%
Surely Tomorrow76%
A Gentleman's Dignity79%
Brewing Love76%
Serendipity's Embrace81%
My Roommate Is a Gumiho81%
Togetherness67%
Nevertheless,73%
The Sound of Your Heart78%
Clean with Passion for Now74%
Wok of Love68%
Mating Season77%
Hyde, Jekyll, Me71%
No Gain No Love84%
Absolute Value of Romance88%
Crushology 10176%
The Girl Who Sees Smells72%
Aqua Teen Hunger Force75%