Hero image: K-Trend Times — ©Medicube / APR.
If a translucent cherry-red brush with an oversized bow has been floating around your feed, it’s not fan art — it’s a real product, and it’s reportedly sold through a 300-unit daily allocation at a Korean pop-up every single day it’s been open. IVE’s Jang Wonyoung has turned a hairbrush into one of this year’s more unlikely K-beauty hits. Here’s what it actually is, why it’s selling the way it is, and whether the four-layer design underneath the branding holds up.
What is the Wonyoung cherry brush?
Its full name is the FOREVER:CHERRY x Medicube Ribbon Cherry Glass Hair Brush — FOREVER:CHERRY being the “worldview” project built around Jang Wonyoung, and this brush is its first official product. It launched in Japan on May 11, 2026, at ¥2,970 (about $17), before expanding to China and, by July, a Korean duty-free push through Shinsegae. The two motifs in the name aren’t just decoration: a cherry-shaped, semi-translucent pink body, and a three-dimensional ribbon bow that doubles as the grip.
Image: Seoul Economic Daily (Sedaily) — ©Medicube / APR.
Why it actually blew up
It’s tempting to chalk this up to “Wonyoung fans will buy anything,” but the sales numbers are real on their own terms: the brush hit #1 overall on Qoo10 Japan on launch day, and by July had passed 100,000 cumulative units sold across Japan and China in roughly two months. A Lotte Department Store pop-up in Korea reportedly 완판 (wanpan) — sold out — its 300-brush daily allocation every day it ran.
A few things are stacking on top of each other here:
- The Wonyoung effect. She’s one of the most recognized Korean-wave figures in Japan specifically, and a ¥2,970 brush is a far easier buy-in to her aesthetic than anything in fashion or luxury beauty.
- It’s built for social feeds. The translucent cherry body and oversized bow read instantly in a photo, which matters as much as the bristles for something this shareable.
- The price is low for idol merch. Fans online were reportedly surprised it wasn’t priced like typical celebrity merchandise — cheaper, in fact, than plenty of ordinary phone grips.
- There’s a real product underneath the branding, which is the part most coverage skips past.
Post: @everythingishere.kh on Instagram.
The one genuinely interesting part: four bristle lengths
Medicube markets the brush around a four-tier pin structure, with each layer doing a different job as it passes through hair:
| Layer | Job |
|---|---|
| Long | Reaches deepest, meets 엉킴 (eongkim, tangles) first |
| Medium | Aligns hair flow |
| Short | Smooths the cuticle surface |
| Micro | Gathers and finishes the finest strands |
Rather than every bristle hitting a knot at the same depth, the graduated lengths are meant to work through hair progressively — which is also the standard design logic behind detangling brushes generally, cherry branding aside. The base sits on a cushioned four-layer pad, which Medicube specifically promotes as reducing pressure on the 두피 (dupi), scalp, while brushing.
What it’s actually supposed to do
Medicube’s marketing leans hard on 유리 머릿결 (yuri meoritgyeol), “glass hair” — but it’s worth separating the plausible mechanism from the marketing language. A brush can’t add gloss to hair. What graduated, cushioned bristles can reasonably do is detangle with less pulling, align strands more evenly, and smooth the surface — and hair that’s smoother and less roughed-up genuinely does reflect light more evenly, which reads as shinier. That’s a real effect; it’s just friction reduction, not a coating.
Is it actually worth it?
Here’s the honest answer: as a hairbrush, it’s a solid, fairly ordinary detangler — reviewers who’ve compared it side by side describe it as functionally close to a Tangle Teezer. What you’re really paying the ~$17 for is the ribbon-and-cherry design, the storage stand and protective cap, and the fact that it’s the first product to carry Wonyoung’s own FOREVER:CHERRY branding rather than a generic endorsement deal. If you want a detangling brush and don’t care about any of that, a cheaper no-name four-layer brush will do the same job. If part of what you’re buying is a wearable piece of the FOREVER:CHERRY aesthetic at a non-luxury price, this is a well-made way to do that — and the resale and sellout numbers suggest a lot of people have already decided it’s worth it on those terms.
Bottom line
The Medicube Cherry Brush works as both a beauty tool and a K-pop collectible because it doesn’t fully fake being either one — the four-layer bristle design is a legitimate, if unremarkable, detangling brush, and the cherry-and-ribbon styling is distinctive enough that someone scrolling past genuinely stops to ask what it is. That combination, more than the Wonyoung name alone, is what turned a $17 hairbrush into a 100,000-unit seller in two months.