Kim Ji-sung

Hwa-young is an 18-year-old student living alone. Her friends call her "mom" and use her house as their place to hang out, but don't really include her in their clique. Hwa-young pays particular attention to one of the friends, Mi-jeong.

An ordinary housewife In-yeong meets carpenter Hui-su by chance in a café and for fun they decide to become coffee mates: friends who only meet in cafés and nowhere else. In a café, they share everything, from their daily routines to their deepest secrets, which have never been shared with anyone before.

The human is the lonely existence. It has nothing to do with an age. There is the other reason. Live, therefore. It is that it became an elderly because it was faithful to the given role and it got old one.

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Hong Se Yeon works as a personal shopper. She is outgoing and a positive person, but she is betrayed by people whom she loved. She begins to take revenge on those who betrayed her. Meanwhile, Eun Kyung Hye is the only child of a CEO. Her life looks perfect, but she has a fear that she will get abandoned. Because of her fear, she has an impulse control disorder and gets compulsive.

Kang Dong-Goo dreams of becoming a movie director, but he is cynical due to bad luck. Cheon Joon-Ki wanted to follow in his father's footsteps and become an actor, but he is now just a minor actor. Bong-Doo-Sik came to Seoul to become a scenario writer, but things have not been easy for him.

Twin sisters swap lives unexpectedly, navigating new worlds and discovering hidden truths about themselves and their relationships.

“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.