Over the years, Super Junior has had a lot of sub-units and solos. Like… a LOT. 83z is their seventh official sub-unit, bringing together members Leeteuk and Heechul. From what I can gather, the two share a passion for nostalgic pop culture and the classic, upbeat OST sound of debut single Promise (너를 위한 약속) backs that up.
This is the kind of completely toothless K-pop track that sounds nice but leaves no real mark. Its sound strongly references rock-tinged summer fare of years (and decades) past, bringing to mind a band performance on a seaside stage with an audience of excited students with their school uniforms slightly askew. The production and songwriting is sound and the guys’ voices work really well together (I love the harmonies!), but the song is too middle-of-the-road to do much beyond provide a pleasant, toe-tapping backdrop. I do enjoy the moment toward the end where the instrumental drops out and we’re left with only voice and handclaps. Promise could do with more of these dynamic switch-ups.
| Hooks | 8 |
| Production | 8 |
| Longevity | 7 |
| Bias | 7 |
| RATING | 7.5 |
Grade: C
The Bias List // K-Pop Reviews & Discussion 
Of course, this track isn’t trying to be a record-breaking or revolutionary release, and that is exactly what makes it so special. While the production maintains a wonderful, high-energy vibe throughout, it doesn’t offer quite as much sonic variation as it could. However, at the end of the day, Heechul and Leeteuk have created something they truly enjoy, beautifully reflecting a deep bond that has spanned over 20 years.
Sometimes, tracks like this don’t need to break new ground; instead, they serve as a lovely memory and a reminder of good times. This song captures the essence of summer perfectly, especially when paired with the music video. Because of that, this track will stick with me—not necessarily for being a musical masterpiece, but for the genuine emotional weight and hope it brings.
I may not be an older fan or someone who has been here from the very beginning, but Super Junior has taken me on a journey that I am enjoying every single second of. Thank you, Super Junior, for everything you do for your fans. Here’s hoping we get to see even more sub-units in the future to continue exploring the unique charms and personalities of all the members!
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Commenting as the resident ELF.
In past years, this would have been a b-side track on a full length SuJu album, no extra subgroup code required. Hear for example the same duo Leeteuk + Heechul self-penned “Sarang (heart)” from the Devil/Magic era album linked below. Great song. I suppose that the release here today is because they just can’t be bothered to wait for the next SuJu album so they did their own mini-album. Or they tried to fit it on the last album and it just didn’t fit.
As for the song itself, I think it is bright, poppy and very OST-adjacent. I like it, as an ELF its very SuJu. It reminds me a bit of the “Come a Little Closer” song which was the TV-theme song for a road trip TV series a subset of SuJu + TVXQ did in 2019.
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Super Junior got me into k-pop back in… 2010-ish? Since then I have most certainly not loved everything they’ve done, both musically and otherwise. But this track makes me forget all those things and takes me right back to the end of high school, the excitement of moving abroad for university, and all the music that became the soundtrack of that part of my life. I’m grateful they decided to make and release this. 🥲
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83z was subunit formed for a performance for Super Juniors encore concert. Heechul had been inactive for seven years and all other members of Super Junior would perform as subunits, but Heechul’s subunits were not active. “Promise” is a song about 83z life story and and the lyrics have deep meaning. Even if it is light. So for a fan of Super Junior the song and the performance is a powerful emotional punch and cannot be understood as toothless (if only because of the lyrics) for them. The sound is always compared with a duo “the Blue”, when 83z played the song on shows before it was released. I don’t have that reference, though. It is nostalgic for sure, it is telling their story of how they met as trainees and I think they wanted to reflect that with the sound as well as the lyrics. And the school uniforms are a callback to how they met as young, but SM decided those things.
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