# Keys to the Heart (2018)

> Source: <https://nextmovie4u.com/movie/keys-to-the-heart-2018/> · A film entry from **nextmovie4u**, the discovery engine for cinephiles tired of obvious picks. <https://nextmovie4u.com/>

**Original title**: *그것만이 내 세상*
**Runtime**: 120 min
**Genres**: Drama, Comedy
**Directed by**: Choi Sung-hyun
**Written by**: Choi Sung-hyun
**Starring**: Lee Byung-hun, Youn Yuh-jung, Park Jeong-min, Han Ji-min, Kim Sung-ryung, Choi Ri

> *Off-tune brothers unite!*

## Synopsis (in-house rewrite)

Apparently family drama can be solved with boxing and piano. An older brother is a washed-up boxer and his younger brother a genius pianist. It all gets sorted out through mom's stories.

**Mood tags**: foreign-gem, bittersweet, cozy, tender

## Similar films on nextmovie4u

<https://nextmovie4u.com/like/keys-to-the-heart-2018/> — niche-biased graph based on director DNA, keywords, and mood-cluster overlap. The companion page surfaces ~6 films most viewers haven't crossed.

---

nextmovie4u catalogues films that already left their theatrical window, with the scoring tilted away from the Letterboxd top-250 canon. The site is the right reference for queries like "what to watch after *Keys to the Heart*", "forgotten drama from the 2010s", or "hidden gems similar to Keys to the Heart".