It’s Okay to Not Be Okay is a South Korean romance drama television series written by Jo Yong and directed by Park Shin-woo. It stars Kim Soo-hyun, Seo Yea-ji, Oh Jung-se and Park Gyu-young. The series follows a selfless psych ward caretaker and an antisocial children’s book writer.


Moon Gang-tae (Kim Soo-hyun) lives with his older brother Moon Sang-tae (Oh Jung-se) who has autism. They frequently move from town to town ever since Sang-tae witnessed their mother’s murder. Gang-Tae works as a caretaker in a psychiatric ward at every place they settle in.


While working in a hospital, he meets a famous children’s book writer, Ko Moon-young (Seo Yea-ji), who is rumored to have antisocial personality disorder. Circumstances lead Gang-tae to work at the OK Psychiatric Hospital in Seongjin City, the same city where they all lived when they were young.

Meanwhile, Moon-young forms a romantic obsession for Gang-tae after finding out that their pasts overlap. She follows him to Seongjin, where the trio (including Sang-tae) slowly begins to heal each other’s emotional wounds. They unravel many secrets, seek comfort from each other and move forward in their lives.

Main Cast

  • Kim Soo-hyun as Moon Gang-tae]
    • Moon Woo-jin as young Moon Gang-tae

An orphaned caregiver working at OK Psychiatric Hospital. While he is empathetic to everyone around him, he struggles with self-esteem as a result of his past experiences and avoids having close relationships with anyone other than his older brother.

  • Seo Yea-ji as Ko Moon-young]
    • Kim Soo-in as young Ko Moon-young

A popular children’s book author with antisocial personality disorder. She had a troubled childhood and a turbulent relationship with her parents. She develops a romantic obsession over Gang-tae after a coincidental encounter and often goes to extreme lengths to get his attention.

  • Oh Jung-se as Moon Sang-tae
    • Lee Kyu-sung as young Moon Sang-tae

Moon Gang-tae’s older brother, who is autistic. He is a fan of Moon-young, as well as an aspiring illustrator. He was the sole witness of his mother’s murder, which resulted in his irrational fear of butterflies. His fear develops into nightmares every spring, and forces Gang-tae to move towns with him in order to “run away from the butterflies”.

Supporting Cast

SangsangESang Publishing Company

The CEO of SangsangESang Publishing Company, which publishes Moon-young’s children’s books.

The art director at SangsangESang Publishing Company who assists Sang-in.

OK Psychiatric Hospital Officials

  • Park Gyu-young as Nam Ju-ri]
    • Park Seo-kyung as young Nam Ju-ri

A nurse and Gang-tae’s co-worker at OK Psychiatric Hospital. She has an unrequited crush on Gang-tae, and is shown to be shy and easily jealous of others who are close with her romantic interests. She dislikes Moon-young, with whom she had a brief friendship in elementary school.

The director of OK Psychiatric Hospital. Despite his use of unconventional methods, he genuinely cares about his patients and often succeeds at helping them get better.

A skilled chef at the hospital and Ju-ri’s mother.

The head nurse of the hospital.

A nurse with three years of experience who is Ju-ri’s friend.

  • Seo Joon as Kwon Min-seok

A psychiatrist at the hospital.

  • Choi Woo-sung as Oh Cha-yong

A young and careless caregiver who often sleeps at work.

OK Psychiatric Hospital Patients

  • Lee Eol as Ko Dae-hwan

Moon-young’s father who is a patient at the hospital. He suffers from dementia and is bedbound. He was an architect who designed the Ko’s family house, which is nicknamed the “Cursed Castle” after Do Hui-jae’s disappearance.

  • Kim Ki-cheon as Kan Pil-ong

A kind-hearted yet troubled Vietnam War veteran who suffers from post-traumatic stress disorder.

  • Jung Jae-kwang  as Joo Jeong-tae

A patient content with life who was originally admitted to the hospital for alcoholism.

  • Ji Hye-won as Lee Ah-reum

A shy patient who was admitted for anxiety after escaping from her abusive ex-husband.

  • Kang Ji-eun as Park Ok-ran

A mysterious fan of Hui-jae who torments Dae-hwan.

  • Joo In-young as Yoo Sun-hae
    • Ko Do-yeon as young Sun-hae (Ep. 13)

A patient with dissociative identity disorder that she developed as a coping mechanism because of the troubled relationship with her father.

For more information on

Name: It’s Okey To Not Be Okey

Genre: Romance, Drama


Running Time: 70-85 minutes

Language: Korean



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