The Sound of Sugar Cubes 2026 Korean BL drama poster with Yoo Do-hyun and Cho Chan-hyun

The Sound of Sugar Cubes

On AirTV Series🇰🇷EP 7

What happens

The Sound of Sugar Cubes (각설탕 소리) is a South Korean BL drama about a voice that went silent and the man determined to hear it again. Lee Han-yul was once a singing trainee. Something in his past made him walk away from everything: his name, his dream and even the sound of his own voice. He has been living as though that part of him were finished.

Then a man appears who acts as if he knows all of it. Lee Won is a star composer, and when the two cross paths again it looks like chance. It is not quite chance. Lee Won has spent a long time searching for one particular person, and now that he has found Han-yul he has no intention of letting him slip away.

"Sing again" is the request at the heart of it. Lee Won wants to pull Han-yul's voice back out into the world, and Han-yul, who swore he would never sing again, decides to step into the light once more to reclaim the past he ran from and the song he lost.

Music becomes the thing that draws them closer, and as it does, a hidden history between them slowly starts to surface. A relationship that began sweetly begins to drift in directions neither of them expected. Picture this: the one person who can give you your stage back also acts as if he knows far more about you than he should. That is the delicious tension the official trailers lean on.

CONTENT DETAILS

Native Title
각설탕 소리
Original Title
Gakseoltang Sori
Adaptation
Adapted from the Korean BL webtoon The Sound of Sugar Cubes (각설탕 소리) by Kim Tak.
Themes
Language
Korean
Episodes
6 / 10
Aired Start
Release Year

Before You Watch

  • Korean release: Wavve, from 23 October 2026, two episodes every Friday at midnight.
  • International release: GagaOOLala from 22 October 2026, with iQIYI also streaming it.
  • Length: ten episodes.
  • Production: OAK Company produces the series for Wavve.
  • Source: adapted from Kim Tak’s BL webtoon of the same name.

Reviewed by Renkaze

8/10

A singer who hid his voice

Idol and music dramas usually start with a dream and a climb. This one starts after the fall. Han-yul has already given up, already hidden, already decided he is done, and the story begins at the moment someone refuses to accept that. That is a much more interesting door to walk through than another audition montage.

The title is a lovely bit of craft, too. A sugar cube makes almost no sound at all, so the name suggests something sweet and very nearly silent, which is exactly where Han-yul's voice is when we meet him.

Sweet, with an edge

The official teasers are careful to pitch this as two things at once. One line has Lee Won telling Han-yul not to break his world again, the other has Han-yul describing the arrival of a man who holds everything about him in his hands. The tone they set is romance with a shadow behind it, which to me reads as dangerous and sweet in the same breath.

Cho Chan-hyun plays Lee Won, and Yoo Do-hyun, formerly of the group MIRAE, plays Han-yul in his first acting role. Casting a real singer as a character who has stopped singing is a smart choice, because the moment his voice returns on screen has to land.

Two cubes every Friday at midnight

This is an OAK Company production for Wavve in Korea, with two episodes released each Friday at midnight across a ten-episode run. Internationally it went out a day earlier, on 22 October 2026, through GagaOOLala, and iQIYI also carries it. The production also shared its first script reading, with Ko Gyeol joining the two leads in the cast.

My score so far

Han-yul has not sung his last note yet, so treat this score as a mid-song rating. I love that the episodes are short and come in pairs, so every week feels like a little double single. Uff, a composer who has searched for one voice for years is exactly the kind of devotion this genre does best. My tip: watch with headphones, because a story about a voice coming back deserves to be heard properly.

If you like your BL with a melody running through it and a secret just under the surface, this is the one to queue up next.

Final Score: 8/10

Themes and Messages

Voice and identity are one and the same here. Han-yul has given up his name and his singing together, so getting his voice back means getting himself back. What a lovely, simple idea.

Obsession and devotion are the second thread. Lee Won has searched for Han-yul for a long time and does not want to lose him again, and the trailers frame that devotion as comforting and unsettling at once. Uff, that mix keeps you on edge.

Buried history is the third. The closer the two grow through music, the more of a hidden past comes into view.

Behind the Scenes

OAK Company produces The Sound of Sugar Cubes for Wavve, adapting Kim Tak's webtoon of the same name. Webtoon readers, you know what you are in for.

The casting announcements named Cho Chan-hyun and Yoo Do-hyun as the leads, and a first script reading with Ko Gyeol came out before the premiere. My tip: watch that script reading first, it is a sweet little warm up.

Did You Know?

  • The series adapts Kim Tak's Korean webtoon 각설탕 소리.
  • OAK Company produces it for Wavve, and GagaOOLala and iQIYI carry it internationally.
  • It premiered on 23 October 2026 with ten episodes.
  • Yoo Do-hyun, formerly of the group MIRAE, makes his acting debut as Han-yul.
  • Cho Chan-hyun, known from Jun and Jun, plays the composer Lee Won.

OFFICIAL TRAILER

Episode guide: The Sound of Sugar Cubes

6 / 10 episodes aired · EP 7
EP 1
23 Oct 2026
Aired
EP 2
23 Oct 2026
Aired
EP 3
30 Oct 2026
Aired
EP 4
30 Oct 2026
Aired
EP 5
06 Nov 2026
Aired
EP 6
06 Nov 2026
Aired
EP 7
13 Nov 2026
Upcoming
EP 8
13 Nov 2026
Upcoming
EP 9
20 Nov 2026
Upcoming
EP 10
20 Nov 2026
Upcoming

FREQUENTLY ASKED QUESTIONS

Who plays Lee Han-yul?

Yoo Do-hyun, a former member of the group MIRAE, plays Han-yul. It is his acting debut.

Who plays Lee Won?

Cho Chan-hyun, who has appeared in Jun and Jun, plays the composer Lee Won.

Who else is in the cast?

Ko Gyeol joins the two leads and took part in the first script reading.

Where was the main trailer released?

On the official STUDIO OAK YouTube channel, under the title "Call Me Back with Your Voice".

Are there character teasers?

Yes. Separate teasers for Lee Han-yul and Lee Won were released on the STUDIO OAK channel ahead of the premiere.

Where a title can be watched, and who is credited on it, may have changed since publication, as our disclaimer explains.

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