Keys to the Heart
그것만이 내 세상
“Off-tune brothers unite!”
We checked 8 streaming services in India on 06 Jun 2026 at 21:41 IST
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.
Cast
Lee Byung-hun
as Kim Jo-ha
Youn Yuh-jung
as In-sook
Park Jeong-min
as Jin-tae
Han Ji-min
as Ga-yool
Kim Sung-ryung
as Ms. Hong
Choi Ri
as Soo-jung
Bek Hyun-jin
as Dong-soo
Hwang Seok-jeong
as Chief Kang
Park Ji-yeon
as Yougn In-sook
Moon Sook
as Bok-ja
Oh Hye-won
as Bok-ja's Guard
Lee Zoo-young
as Eun-ha
Ahn Seong-bong
as Sky Lounge Manager
Park Ji-hoon
as Tae-gu
Park Soo-oh
as Young Jo-ha
Yoon Yeong-gyun
as Policeman
Son Woo-hyuk
as Eun-ha's Boyfriend
Yang Jun-seok
as Big High School Student
Kim Sang-Wook
as
Jung Yun-ha
as Bok-ja's Guard
Where does Keys to the Heart rank today?
Keys to the Heart is #5607 on the CineFlixo Daily Streaming Charts today.
- Highest: #5607
- Top 10: 0 days
- Top 100: 0 days
Watch Keys to the Heart Online Free in HD
Stream Keys to the Heart online free in HD on CineFlixo. A highly acclaimed drama and comedy movie originally produced in Coreano and released in 2018, it's earned a solid 8.0/10 from 48 viewers worldwide.
About Keys to the Heart
“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. Running 120 minutes.
Keys to the Heart Cast and Characters
The cast features Lee Byung-hun (as Kim Jo-ha), Youn Yuh-jung (as In-sook), Park Jeong-min (as Jin-tae), Han Ji-min (as Ga-yool), and Kim Sung-ryung (as Ms. Hong). Their performances are a major reason Keys to the Heart has built such a passionate audience.
Where to Watch Keys to the Heart Online
On CineFlixo you can watch Keys to the Heart free — no account, no credit card, no ads in the middle of the show. We stream the full film in 720p / 1080p HD, with subtitles when available, on any device: phone, tablet, laptop, or smart TV browser.
▶ Watch Keys to the Heart NowWhy People Are Watching Keys to the Heart
There's a reason Keys to the Heart keeps showing up on "must-watch" lists. What makes it work is emotional weight that hits where it counts and sharp comedic timing that lands consistently. If you enjoy Coreano storytelling that doesn't follow the same tired beats, this is the kind of film you'll end up recommending to friends.
Frequently Asked Questions about Keys to the Heart
Where can I watch Keys to the Heart online for free?
You can watch Keys to the Heart online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.
How long is Keys to the Heart?
Keys to the Heart runs for 120 minutes (about 2 hours).
Is Keys to the Heart good? What's the rating?
Keys to the Heart holds a 8.0/10 rating based on 48 reviews — genuinely excellent.
Who is in the cast of Keys to the Heart?
The main cast includes Lee Byung-hun, Youn Yuh-jung, Park Jeong-min, and Han Ji-min, plus a strong supporting ensemble.
Is Keys to the Heart available in Coreano?
Yes — Keys to the Heart was originally produced in Coreano and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.
When was Keys to the Heart released?
Keys to the Heart was released in 2018.
Do I need an account to watch Keys to the Heart on CineFlixo?
No. CineFlixo is free and you can watch Keys to the Heart without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.
Similar Movies You Might Like
If you enjoyed Keys to the Heart, check out The Piano, Ray, The Piano Teacher, The Life and Loves of Beethoven, and Shoot the Piano Player.
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Frequently Asked Questions
Common questions about Keys to the Heart
Where can I watch Keys to the Heart for free?
You can watch Keys to the Heart (2018) online for free on CineFlixo. Just click "Watch Free" on this page to start streaming instantly — no account, subscription, or downloads required.
What is Keys to the Heart about?
Keys to the Heart is a Drama/Comedy film. 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.
When was Keys to the Heart released?
Keys to the Heart was released on January 17, 2018. It has a runtime of 2h 0m. The film was produced by CJ Entertainment.
Who stars in Keys to the Heart?
Keys to the Heart stars Lee Byung-hun, Youn Yuh-jung, Park Jeong-min and Han Ji-min. The full cast list is available in the Cast section above.
Is Keys to the Heart available in HD?
Yes, Keys to the Heart is available to stream in high definition (HD) on CineFlixo. Our players automatically deliver the best quality your connection supports — no extra setup needed.