Keys to the Heart_
Original: 그것만이 내 세상
"Off-tune brothers unite!"
An older brother is a washed-up boxer. His younger brother is a genius pianist with physical disability. The brothers make up through their mother who is full of stories of her past.
Starring
Lee Byung-hun, Youn Yuh-jung, Park Jeong-min
Updated Feb 16, 2026
WHERE TO WATCH
DROPTHE_ GOSSIP
Year context
Keys to the Heart was released 8 years ago in 2018.
Overview
An older brother is a washed-up boxer. His younger brother is a genius pianist with physical disability. The brothers make up through their mother who is ful...
Keys to the Heart is a Drama, Comedy film with a runtime of 2h 0m.
CAST (20)
Lee Byung-hun
Kim Jo-ha
Youn Yuh-jung
In-sook
Park Jeong-min
Jin-tae
Han Ji-min
Ga-yool
Kim Sung-ryung
Ms. Hong
Choi Ri
Soo-jung
Bek Hyun-jin
Dong-soo
Hwang Seok-jeong
Chief Kang
Park Ji-yeon
Yougn In-sook
Moon Sook
Bok-ja
Oh Hye-won
Bok-ja's Guard
Lee Zoo-young
Eun-ha
Ahn Seong-bong
Sky Lounge Manager
Park Ji-hoon
Tae-gu
Park Soo-oh
Young Jo-ha
Yoon Yeong-gyun
Policeman
Son Woo-hyuk
Eun-ha's Boyfriend
Yang Jun-seok
Big High School Student
Kim Sang-Wook
Jung Yun-ha
Bok-ja's Guard
DETAILS
Release
Status
Released
Runtime
120 min (2h 0m)
Original Title
그것만이 내 세상
Language
Korean
Country
Rating
8.0/10 (47 votes)
Popularity
1
FREQUENTLY ASKED QUESTIONS
What is Keys to the Heart about?
An older brother is a washed-up boxer. His younger brother is a genius pianist with physical disability. The brothers make up through their mother who is full of stories of her past.
How long is Keys to the Heart?
Keys to the Heart has a runtime of 120 minutes (2h 0m).
Who stars in Keys to the Heart?
The cast of Keys to the Heart includes Lee Byung-hun, Youn Yuh-jung, Park Jeong-min, Han Ji-min, Kim Sung-ryung.
What is the rating of Keys to the Heart?
Keys to the Heart has a rating of 8.0 out of 10 based on 47 votes on TMDB.
GENRES (2)
Drama
Comedy