Keys To The Heart

Keys To The HeartProfile

  • Movie: Keys To The Heart (English title) / That’s Only My World (literal title)
  • Revised romanization: Geugeotmani Nae Sesang
  • Hangul: 그것만이 내 세상
  • Director: Choi Sung-Hyun
  • Writer: Choi Sung-Hyun
  • Producer: Min Kyung-Wook, Joo Seung-Hwan
  • Cinematographer: Kim Tae-Sung, Hong Seung-Hyuk
  • Release Date: January 17, 2018
  • Runtime: 120 min.
  • Genre: Comedy / Drama / Brothers
  • Distributor: CJ Entertainment
  • Language: Korean
  • Country: South Korea


An older brother (Lee Byung-Hun) is a washed-up boxer. His younger brother (Park Jung-Min) is a genius pianist with physical disability. The brothers make up through their mother In-Sook (Youn Yuh-Jung) who is full of stories of her past.


  1. Filming began June 6, 2017 and finished August 27, 2017.


Additional Cast Members:

  • Moon Sook – Bok-Ja
  • Hwang Suk-Jung – Department Head Kang
  • Baek Hyun-Jin – Dong-Soo
  • Jo Kwan-Woo – Moon Sung-Gi
  • Park Ji-Hoon – Lee Tae-Goo
  • Kim Seo-Won – senior colleague
  • Hong Suk-Youn – Jo-Ha’s father


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