“Wondering where you can watch ‘Secret: Untold Melody’ for free?”
Are you curious about that?
The Korean film “Secret: Untold Melody”, releasing on Friday, October 3, 2025, stars EXO’s D.O. (Do Kyung-soo), Won Jin-a, and Shin Ye-eun.
Based on the Taiwanese mega-hit “Secret”, it blends beautiful melodies with a heartrending love story that will capture your heart.
This article offers a thorough guide to watching “Secret: Untold Melody” for free or at a bargain, likely streaming platforms, cast details, synopsis, and early buzz.
It’s packed with tips for anyone planning to wait for streaming after the theatrical run.
All right, Milkuma Investigation Squad is on the case, bear!
…But first I’ll practice the piano, bear.
The only piece I can play is “Chopsticks,” bear~♪
What is Secret: Untold Melody?
“Secret: Untold Melody” is a Korean film opening in Japan on Friday, October 3, 2025 (Korean title: “Secret: Untold Melody”).
It is a remake inspired by the 2007 Taiwanese film “Secret,” reimagined with Korean sensibilities and visual beauty.
At its center is a boy-meets-girl tale set at a music university.
Guided by the sound of a piano, the two meet and are drawn to each other—but the heroine’s hidden secret threatens to shake their relationship.
Production background and key points
Directed by Seo Yumin, the film stays true to the original’s bittersweet romance while infusing a distinctly Korean tone.
Lead actor D.O. (Do Kyung-soo / EXO) delivers nuanced emotion and takes on piano performance scenes.
Won Jin-a plays the heroine, while Shin Ye-eun appears as a pivotal character—an ensemble of skilled performers.
The original “Secret” is renowned for fusing piano and fantasy, with its musical sequences praised worldwide.
This Korean version preserves the original’s appeal while adding Korean-style emotion and visuals to deliver fresh pathos.
“Secret: Untold Melody” is a Korean remake inspired by the Taiwanese film “Secret.”
A beautiful coming-of-age love story where piano, romance, and a hidden secret intertwine.
Synopsis & film details
“Secret: Untold Melody” follows two fated encounters on a quiet music-university campus.
Yoo-joon (D.O.), a piano major, is drawn one day to a beautiful piano melody coming from an old school building.
There he meets Jung-ah (Won Jin-a), a girl with a mysterious aura.
As they grow closer through music, Jung-ah’s unspeakable secret emerges.
That secret will profoundly shape their relationship and their future…
A poignant and beautiful tale spun along the piano’s notes will move audiences deeply.
Film information
| Title | Secret: Untold Melody (Japanese title: シークレット・メロディ) |
|---|---|
| Release date | Friday, October 3, 2025 |
| Director | Seo Yumin |
| Screenplay | Jang Young-min |
| Cast | D.O. (Do Kyung-soo), Won Jin-a, Shin Ye-eun, Bae Sung-woo, Kang Mal-geum |
| Genre | Romance / Music / Youth |
| Distributor | Klockworx |
| Based on | Taiwanese film “Secret” (director: Jay Chou) |
| Runtime | TBD |
A youth romance where music, love, and a “secret” intertwine.
Expect strong social buzz after release.
Highlights to know before watching
“Secret: Untold Melody” is more than a romance—it’s a work where music, visuals, and story function as one.
Here are key points to check before you watch.
1. Nuanced acting from a skilled cast
D.O. (Do Kyung-soo) pairs EXO-level charisma with finely tuned emotional acting.
Won Jin-a’s transparently delicate performance perfectly conveys the heroine’s mystery.
Shin Ye-eun plays a key role that adds depth to the narrative.
2. Beautiful piano performances and music sequences
The standout trait is the stirring piano.
D.O. intensely practiced piano before filming, tackling performance scenes himself.
The music director’s original score both arranges iconic themes from “Secret” and adds new pieces to color the film’s world.
3. Korean-style visual beauty and emotion
While inheriting the Taiwanese original’s charm, the film highlights distinctly Korean color palettes and cinematic language.
Campus scenery across the seasons, warm lighting, and expressive use of rain and twilight all enhance the visuals.
4. A plot with a touch of mystery
Though a love story, the heroine’s “secret” drives the plot.
Viewers will be drawn not only to where the relationship goes, but also to uncovering the truth of that secret.
A fresh blend of romance, music, and mystery.
Performance, music, and visuals come together at a high level.
Streaming services likely to carry “Secret: Untold Melody”
With a October 3, 2025 release, streaming is expected on major services after the theatrical window.
Based on past Korean releases and Klockworx’s patterns, here are estimated timelines.
| Service | Estimated start | Price | How to watch for free |
|---|---|---|---|
| Amazon Prime Video | Around February 2026 | ¥600/month (tax incl.) | Use the 30-day free trial |
| U-NEXT | Around January 2026 | ¥2,189/month (tax incl.) | 31-day free trial + points |
| Netflix | Spring 2026 | From ¥790/month | No free period |
| Hulu | Around February 2026 | ¥1,026/month (tax incl.) | Use the 2-week free trial |
| Disney+ | Lower likelihood | ¥1,320/month (tax incl.) | No free period |
| ABEMA | Around March 2026 | ¥960/month (tax incl.) | Use the 2-week free trial |
Similar titles from the same distributor often start streaming about 4–5 months after theatrical release.
In particular, U-NEXT and Amazon Prime Video tend to be faster and also carry many Korean films—keep an eye on them.
Time your free trials to the streaming window to potentially watch “Secret: Untold Melody” at minimal cost.
FAQs about watching “Secret: Untold Melody”
We’ve compiled common questions from viewers considering this film.
Check release timing, streaming expectations, free viewing options, and more.
Q1. How long will it be in theaters?
It’s slated to open Friday, October 3, 2025 nationwide.
Korean films typically run 1–2 months, though popular titles may be extended depending on attendance.
Q2. When will streaming begin?
For recent Klockworx titles, streaming often starts about 4–5 months post-release.
That makes January–February 2026 likely for “Secret: Untold Melody.”
Q3. Is there a way to watch for free?
After it begins streaming, you can potentially watch during U-NEXT or Amazon Prime Video free trials.
Be mindful that plans auto-renew after the free period.
Q4. How does it differ from the original “Secret”?
The original is a Taiwan-set youth romance; this version moves the setting to Korea and reflects Korean sensibilities and culture.
Music scenes and side-character portrayals also feature unique adjustments.
Q5. Subbed or dubbed?
Currently planned as a subtitled theatrical release; some platforms may add a dub at streaming.
Streaming won’t begin immediately after release.
If you want to watch for free, align a free trial with the streaming start.
Main cast filmography
Here are notable past works from the principal cast—great for appreciating their performances going into this film.
D.O. (Do Kyung-soo / EXO)
- Along with the Gods: Parts 1 & 2 (2017/2018) — Blockbuster fantasy set in the afterlife
created by Rinker¥6,518 (2025/10/07 11:16:06時点 Amazon調べ-詳細) - Swing Kids (2018) — A young man in a POW camp takes on tap dance
- 100 Days My Prince (2018, Drama) — A crown prince with amnesia and a commoner woman’s love story
- The Moon (2023) — A human drama set in space
Won Jin-a
- Waiting for Rain (2021) — A tender romance born from exchanging letters
created by Rinker¥440 (2025/10/07 14:09:59時点 Amazon調べ-詳細) - Romance Is a Bonus Book (2019, Drama) — A rom-com set in publishing
- Life (2018, Drama) — A medical suspense drama set in a major hospital
- Long Live the King (2019) — A reformed gangster’s political struggle
Shin Ye-eun
- The Glory (2022–2023, Drama) — Noticed for portraying the protagonist’s school-days counterpart
- Taxi Driver 2 (2023) — A hit blend of action and revenge
- Be Melodramatic (2019, Drama) — Love lives of women in their late 20s恋愛体質～30歳になれば大丈夫(吹替版)
The leads are proven talents—sampling their past work will heighten your enjoyment of “Secret: Untold Melody.”
Similar & related recommendations
If you liked “Secret: Untold Melody,” here are films and dramas with similar themes or vibes—music, romance, youth, and a hint of mystery.
1. Secret (2007, Taiwan)
A youth romance directed by and starring Jay Chou.
A boy and girl brought together by piano melodies—and the heroine’s secret.
As the inspiration for “Secret: Untold Melody,” it’s great for comparison viewing.
2. Waiting for Rain (2021, Korea)
Starring Won Jin-a.
A warm romance that begins with exchanging letters; its subtle emotions and delicate distance stand out.
3. Architecture 101 (2012, Korea)
A moving coming-of-age film about first love.
An excellent structure that weaves past and present.
4. Josée (2020, Korean remake)
A Korean remake of the Japanese classic.
Its reshaped cultural context shares appeal with “Secret: Untold Melody.”
5. Love Letter (1995, Japan)
A classic that fuses pure love with striking visuals.
Snowy landscapes and the motif of letters linger long after viewing.
Watching the original “Secret” alongside the Korean remake lets you savor cultural and stylistic differences even more deeply.
Check the buzz on social media!
“Secret: Untold Melody” is generating major pre-release buzz on social platforms.
Fans are especially excited about the cast, comparisons with the original, and the music sequences.
Reactions on Twitter (X)
- “I can’t wait to see D.O.’s piano scenes!”
- “Won Jin-a’s clear, gentle acting will shine.”
- “Curious how it will differ from ‘Secret’…”
- “I just know the visuals and music will make me cry.”
Instagram posts
- Lots of shares of the released poster art
- Screenshots and impressions from the teaser
- Support posts from cast fan accounts
Five evaluation parameters (based on trailers & early buzz)
| Category | Score (out of 20) |
|---|---|
| Cast appeal | 19 |
| Anticipation for the music | 20 |
| Visual beauty | 18 |
| Story intrigue | 18 |
| Social buzz | 19 |
Total score: 94/100
Even pre-release, expectations for the cast and the music are sky-high.
The social buzz is likely to accelerate after opening.
Now I’m ready to enjoy opening day to the fullest, bear!
…But I can’t wait for streaming, bear.
Time to learn piano and aim for the lead role, bear~!
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