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The flâneur's letter

New houses, rare pieces and private appointments. Once a month.

Flâneur Séoul

Contemporary designers from Seoul, curated for Paris.

Instagram — @flaneurseoul

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The flâneur's letter

New houses, rare pieces and private appointments. Once a month.

Flâneur Séoul

Contemporary designers from Seoul, curated for Paris.

Instagram — @flaneurseoul
The maison+
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Help+
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Company information

Flâneur Séoul is operated by Soonicorn Inc. · CEO: Geonhaeng Lee

Registered office: #104-215, 137 Wangsimni-ro, Seongdong-gu, Seoul, Republic of Korea

Business registration no. (KR): 866-87-02563 · E-commerce permit: No. 2026-Seoul Seongdong-0183

Customer service: +82-70-8983-8996 · Email: ops@soonicorn.co.kr

Data protection officer: Seongyeol Yang (syy@soonicorn.co.kr) · Hosting provider: Soonicorn Inc.

© 2026 Flâneur Séoul — All rights reserved.

Site in English · Français · 한국어 available

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JOHN&3:21

The house

JOHN&3:21

By Jong-gyu Yun · Seoul

Hand-worked curves from the Seoul runway

JOHN&3:21 is the Seoul label of designer Jong-gyu Yun, a regular on the Seoul Fashion Week runway. The house is known for hand-worked curves and an artistic deconstructivism, shown alongside a line of graphic jersey pieces.

Discover the house
Delinquent T-Shirt — view 1
Delinquent T-Shirt — view 2
Delinquent T-Shirt — view 3
Delinquent T-Shirt — view 4
Delinquent T-Shirt — view 5
Delinquent T-Shirt — view 6
Delinquent T-Shirt — view 7
JOHN&3:21

Delinquent T-Shirt

60 € (US$62.24)

Final price may vary based on current exchange rates.

Taxes and duties included

Delinquent T-Shirt — graphic short-sleeve T-shirt from JOHN&3:21's ready-to-wear line.

Size

Free returns within 14 days

Fit & details+

A graphic short-sleeve T-shirt from the John321 ready-to-wear line.

Material & care+

Fabric composition not specified by the maker.

Shipping & returns+

Shipped from Seoul — 5–8 business days.

Free returns within 14 days, in line with your right of withdrawal.

Read the full return & refund policy

Taxes & duties+

Taxes and customs duties included — no fees on delivery.

The house

JOHN&3:21

By Jong-gyu Yun · Seoul

Hand-worked curves from the Seoul runway

JOHN&3:21 is the Seoul label of designer Jong-gyu Yun, a regular on the Seoul Fashion Week runway. The house is known for hand-worked curves and an artistic deconstructivism, shown alongside a line of graphic jersey pieces.

Discover the house

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