Sun Jae walked onto Korean screens in April 2024 and, within 24 hours, men across Korea were screenshot-saving his outfits faster than they were saving his lines. On DCInside’s Lovely Runner gallery (디씨인사이드 선재업고튀어 갤러리), outfit analysis threads hit 50,000+ views within a day of each episode dropping, according to fan community aggregators tracking gallery traffic — numbers typically reserved for idol comeback reactions, not drama costume discussions.
What made Korean fashion communities lose their minds wasn’t that Sun Jae looked impossibly stylish. It was that he looked achievable. The word that kept appearing in those threads? 현실적 — realistic. That’s the whole story.
This breakdown covers the exact Korean brands behind the look, real prices in KRW and USD, specific outfits broken down by episode, and the cultural mechanics that make korean drama male fashion casual outfits inspired by Sun Jae land so differently from every other drama wardrobe that came before it.
Why Sun Jae’s Style Hit Different: The ‘Sunmul Nam’ Microtrend Explained
Before unpacking the outfits themselves, you need to know about 순물남 — pronounced “sun-mul-nam,” short for 순수한 물성의 남자, roughly translating to “natural material man.” It’s a microtrend that took root in Korean men’s fashion communities in late 2023 and fully bloomed during Lovely Runner’s April–June 2024 run.
The aesthetic centers on unbleached cottons, washed linens, stone-dyed fabrics, and textures that look like they’ve had a life. Nothing synthetic. Nothing stiff. The vibe is closest to what happens when Japanese 시티보이 (city boy) aesthetics meet Korean practicality — easy to wear, hard to get wrong, impossible to look overdressed in.
This is a deliberate pivot from what dominated Korean men’s fashion in 2022–2023. That era was split between gorpcore (Arc’teryx vests, technical outdoor gear worn in coffee shops) and the 클린핏 (clean fit) movement — sharp tailoring, structured pieces, heavy investment in brand logos. Both trends required either money or effort to execute. Sunmul nam asks for neither. It asks for taste.
The numbers backed this shift fast. Musinsa, Korea’s dominant men’s fashion platform, reportedly recorded a 340% spike in searches for “남성 린넨 셔츠” (linen shirts for men) during the drama’s airing window — a figure cited in 어패럴뉴스’s May 2024 trend coverage of the drama’s fashion impact (“선재업고튀어’가 바꾼 남성 패션 검색어,” 어패럴뉴스, 2024년 5월). That’s not organic seasonal interest. That’s Sun Jae effect, measurable in real-time search data.
And the actor behind the character carries his own credibility into this. Byeon Woo-seok was already a fashion industry name before Lovely Runner — he’s been a Valentino Korea ambassador, which means Korean fashion editors already knew his proportions and his instinct for understated dressing. Sun Jae’s wardrobe wasn’t an accident. It was a studied choice made by a team that understood exactly what resonated with Korean men in their 20s right now.
Sun Jae’s Signature Outfit Formula: Breaking Down the 3-Piece Code
Watch enough episodes and the formula reveals itself. Sun Jae’s casual looks almost always follow the same three-part structure: oversized washed tee + straight-cut trousers + one quiet accent piece. The accent rotates — sometimes a bucket hat, sometimes a minimal canvas tote, sometimes a thin open shirt worn as a layer. But the core never changes.
The color logic is equally disciplined. Sun Jae operates almost exclusively within ecru, stone, dusty blue, and washed black in his casual scenes. No saturated colors. No prints. Korean stylists working within the sunmul nam aesthetic deliberately avoid anything that reads as “trying too hard” — bright colors in this context signal effort, and the whole point is effortlessness.
Korean stylists call the fit philosophy 여유핏 (yeo-yu fit — “room-to-breathe fit”). It’s relaxed without being sloppy. Shoulders sit slightly wide, trousers break just above the ankle, tees have enough room to move but don’t swallow the body. It’s the difference between “I grabbed this from the floor” and “I chose this carefully to look like I grabbed this from the floor.”
One more deliberate choice worth flagging: Sun Jae wears almost no visible logos in casual scenes. This is intentional styling, not budget limitation. It plugs directly into the 조용한 럭셔리 (jo-yong-han reo-geo-ri, “quiet luxury”) trend dominating Korean men aged 20–29 — the idea that knowing people will recognize quality without being told is the actual flex.
Sun Jae’s Casual Outfits by Episode: The Korean Brand Breakdown
Korean fan communities — particularly the Lovely Runner outfit identification thread on Naver Café 드라마갤러리 and dedicated Byeon Woo-seok fancafes — did the heavy lifting here. Fans cross-referenced fabric texture, seam placement, label shapes, and drawstring details visible in high-resolution broadcast stills. What follows aggregates those identifications alongside verified Musinsa and brand listing prices as of mid-2024.
Episode 4: The Riverside Scene (Most-Replicated Look)
This became the single most-screenshotted outfit from the entire drama run. Fan communities on DCInside and Naver Café identified all three pieces within 48 hours of the episode airing, with multiple threads hitting 1,000+ replies confirming the same brand tags.
| Piece | Brand / Item | Price (KRW) | Price (USD approx.) |
|---|---|---|---|
| Washed Cotton Tee | Nohant — Pigment-dyed pocket tee, ecru | ₩49,000 | ~$36 |
| Straight-Cut Trousers | Aeca — Wide straight cotton pants, stone | ₩89,000 | ~$65 |
| Accent Layer | Nohant — Washed linen overshirt, off-white | ₩79,000 | ~$58 |
Stylist note: The overshirt is worn fully unbuttoned here — a deliberate layering move that adds visual structure without weight. Korean fashion threads specifically called out the way the linen hem grazes the trouser waistband, creating a clean column of ecru-to-stone tone. Full look lands under ₩220,000 (~$160), which is exactly why it got replicated so fast.
Where to buy: Both Nohant and Aeca have Musinsa storefronts with international shipping. Nohant also ships directly via their own site (nohant.kr).
Episode 7: The Practice Room Look (The One Korean Men Actually Copied)
This is the outfit that spawned the most “outfit recreation” posts on Korean Instagram and Twitter/X through May 2024. It’s simpler than the Episode 4 look — which is precisely why it spread further. Two pieces, zero effort optics, completely on formula.
| Piece | Brand / Item | Price (KRW) | Price (USD approx.) |
|---|---|---|---|
| Graphic Tee | Matin Kim — Minimal logo crop tee, washed black | ₩59,000 | ~$43 |
| Trousers | Aeca — Relaxed tapered jogger, charcoal | ₩79,000 | ~$58 |
| Footwear | New Balance 574 — Grey/white colorway | ₩109,000 | ~$79 |
Stylist note: Matin Kim is a Musinsa brand-of-the-year alumni that sits in a interesting middle tier — it reads as fashion-aware without signaling “I am trying to dress like a fashion person.” That positioning is exactly right for Sun Jae’s character. The washed-black tee in particular erases any visible branding at camera distance, keeping the 조용한 럭셔리 logic intact even in a graphic-tee context.
The New Balance 574 choice here is deliberate and worth unpacking. Korean men’s fashion communities had already established the 574 as the default “correct sneaker” within the sunmul nam framework by early 2024 — it reads as familiar rather than statement-making, which is the whole point. The alternative that shows up in fan recreations almost as often: the New Balance 993 in grey (~₩189,000, ~$138).
Where to buy: Matin Kim ships internationally via their site and Musinsa Global. New Balance 574 available at NB Korea flagship stores nationwide and on Musinsa.
Episode 11: The Rain Scene Jacket Look (Highest Search Volume, Post-Air)
According to Musinsa’s publicly shared search trend data (referenced in post-drama roundups on fashion media site 패션포스트 in July 2024), searches for “남성 워싱 재킷” (men’s washed jacket) spiked the week after Episode 11 aired. This look is why.
| Piece | Brand / Item | Price (KRW) | Price (USD approx.) |
|---|---|---|---|
| Outer Layer | Nohant — Garment-washed cotton blouson, dusty blue | ₩139,000 | ~$101 |
| Base Layer | Nohant — Ribbed cotton tee, ecru | ₩39,000 | ~$28 |
| Trousers | Ordinary Fits — 5-pocket straight denim, washed indigo | ₩119,000 | ~$86 |
Stylist note: This is the most “wearable in a non-Korean context” outfit of the three. The dusty blue blouson over ecru creates a tone contrast that works in almost any climate. Ordinary Fits is a brand that consistently appears in Korean men’s wardrobe essentials lists — their denim cuts run straight and slightly long, which plays directly into the 여유핏 ankle-break aesthetic. Fan communities noted that the blouson’s dropped shoulders mirror the tee’s proportions, creating a consistent shoulder line across layers. Full look: ₩297,000 (~$215).
Where to buy: Ordinary Fits ships internationally via their own site. Nohant available via Musinsa Global. Both brands maintain English-language product listings.
The Korean Brands Powering Sun Jae’s Wardrobe: Quick Reference
Three brands appear more than any others across the fan community’s outfit identifications. Here’s the context on each — useful if you’re building the look from scratch rather than hunting specific episodes.
Nohant (노앙) — The anchor brand. Positioned as a mid-tier Korean menswear label with a consistent focus on garment-dyeing and natural fabrics. Price range: ₩39,000–₩159,000 ($28–$115) for core pieces. Available internationally via Musinsa Global.
Aeca (에이카) — The trousers brand. Aeca’s straight-cut and relaxed-tapered silhouettes became a default within Korean sunmul nam circles in 2023–2024. Consistently recommended in Korean men’s style communities as the best price-to-quality ratio for the aesthetic. Price range: ₩69,000–₩99,000 ($50–$72).
Ordinary Fits (오디너리 핏) — The denim authority. A Korean brand with a dedicated following for their measured, consistent approach to casual men’s basics. Their denim in particular gets cited in Korean fashion forum posts as the “correct” non-Japanese-import option for the sunmul nam wardrobe. Price range: ₩89,000–₩139,000 ($65–$101).
How to Actually Build This Look Outside Korea
The good news: all three anchor brands have international shipping options or Musinsa Global storefronts. The slightly complicated news: some colorways sell out fast post-drama, and not all pieces ship to every country.
For readers outside Korea, the practical approach that Korean fashion communities recommend for building the sunmul nam aesthetic without direct access to Korean brands:
- Tees: Uniqlo’s garment-dyed tee line is the most-cited substitute in Korean fashion threads for readers who can’t access Nohant directly. The cut runs slightly slimmer, so size up one.
- Trousers: COS’s straight-cut cotton trousers land closest to the Aeca silhouette — the fabric weight is comparable and the color range overlaps significantly with the stone/ecru palette.
- Outerwear: The Nohant blouson is harder to substitute directly, but Korean fashion editors pointing international readers toward the aesthetic typically recommend checking Lemaire diffusion lines or Korean brand AURALEE’s basics if budget allows.
- Sneakers: New Balance 574 or 993 in grey or sand colorways. This one isn’t negotiable according to the community — the silhouette is specifically what reads as “correct” within the sunmul nam framework.
The total investment for a core Sun Jae-adjacent wardrobe — two tees, one trouser, one layering piece, one pair of sneakers — runs approximately ₩350,000–₩500,000 ($255–$365) buying Korean brands direct, or slightly less using the international substitutes above. That’s the price point Korean men’s fashion communities consistently cite as “accessible without feeling cheap.”
Why This Look Has Staying Power Beyond the Drama
Most drama fashion moments are time-stamped. The gorpcore vest from 2022 feels dated now. The 클린핏 structured blazer from 2023 dramas already reads as “a moment that passed.” Sun Jae’s look doesn’t have that problem — because it was never actually about the drama.
The sunmul nam aesthetic predates Lovely Runner and will outlast it. What the drama did was accelerate adoption by giving the aesthetic a face and a narrative context — a character people wanted to be, wearing clothes people could actually buy. That combination is rare.
Korean men’s fashion communities tracking the trend through late 2024 consistently note that the core pieces — natural fabrics, relaxed fits, muted palette, no logos — are holding as wardrobe staples rather than cycling out as trend casualties. The 340% Musinsa search spike normalized into sustained elevated search volume for the category, not a spike-and-collapse pattern.
That’s not a drama effect. That’s a genuine aesthetic shift that a drama happened to crystallize. Sun Jae just wore it first — or at least, first in front of enough people for it to stick.