Hyehwa couple phone case shop: AI-extended Gwanghwamun photo, Casedby

In short

Casedby Hyehwa is a 24-hour unmanned custom phone case shop on Daemyeong-gil in Jongno, Seoul, near Exit 4 of Hyehwa Station. After a Daehak-ro play date, the writer used AI image extension to fit a photo taken at Gwanghwamun and made MagSafe couple phone cases in about 2 minutes, and was happy with the print quality and full-cover protection. With a one-of-a-kind case in the ₩20,000s, Casedby Hyehwa is worth adding to a Daehak-ro date.

Keepsake photo of the custom phone case on the way to Gwanghwamun

Good to know

Getting there
Hyehwa Station Exit 4 · 3-min walk (store listing, Oct 24, 2026)
Location
Hyehwa Station Exit 4, 37 Daemyeong-gil, Jongno-gu, Seoul
Hours
Open 24 hours, unmanned
Making time
About 2 minutes
Compatible models
iPhone 11–17 series, Galaxy 21–25 series
Price
Custom MagSafe full-cover case in the ₩20,000s (not much more than a regular case)
Other
Custom phone accessories and keyrings, instant-print souvenir photo area
Price reference
₩20,000 ≈ $15 (2026-11-11)

as written by the visitor on Apr 28, 2026 · not checked with the business

Main image of making couple phone cases at Casedby Hyehwa
Couple phone cases made after a Daehak-ro play date

Where is Casedby Hyehwa, and when can you go?

Casedby Hyehwa (케이스드바이 혜화) is a custom phone case shop near Exit 4 of Hyehwa Station, at 37 Daemyeong-gil, Jongno-gu, Seoul. It's unmanned and open 24 hours, so you can drop in at any time after your Daehak-ro play date.

Casedby Hyehwa shop near Hyehwa Station
Entrance of the unmanned Casedby Hyehwa shop

After a Daehak-ro play date, a lot of people look for a workshop date or something fun to do. I made couple phone cases at Casedby, which has recently become a hot Hyehwa date workshop spot ✨ Since it's a custom phone case made from your own photos, you can make a one-of-a-kind case that's totally yours.

Inside the 24-hour unmanned Casedby Hyehwa shop
Case-making area inside Casedby Hyehwa

The shop is unmanned and open 24 hours, so after your Daehak-ro play date you can visit whenever suits you, and I liked that with no staff around I could take my time picking photos in peace! There's also a spot for souvenir photos that print out right away, so be sure to take one before you leave 📸

Instant-print souvenir photo area at Casedby Hyehwa
Souvenir photo-taking spot inside Casedby Hyehwa
Product displays inside Casedby Hyehwa

What cases and accessories does Casedby Hyehwa have?

Casedby Hyehwa has ready-made cases featuring well-known designers' artwork, plus a wide range of phone accessories and keyrings. You can also just pick a finished design instead of using your own photo~

Among the cute, trendy finished designs, the cat case was so adorable that I agonized over it for a long time, but in the end I went with my own photo to make a phone case that's truly one of a kind :)

Display of designer-finished phone cases at Casedby
Cute, trendy case designs at Casedby Hyehwa

In one corner of Casedby Hyehwa there's a really wide variety of phone accessories, so you can customize with your favorite styles and combinations, which felt special~

Phone accessory corner at Casedby Hyehwa
Keyrings and phone accessories at Casedby Hyehwa

There were so many pretty designs and even the trendy keyrings of the moment, so I hear lots of students visit~ If you already have plenty of cases, making just a phone accessory would be nice too, and paying is easy.

Casedby custom phone case instructions

How long does a Casedby phone case take, and which models work?

A Casedby custom phone case takes about 2 minutes to make, so it's quick. It supports iPhone 11 through iPhone 17 series, and Samsung (삼성, Samseong) Galaxy 21 through Galaxy 25 series.

Casedby phone case machine screen
Choosing phone model and case type at Casedby

How does Casedby work, and is it easy even if you're bad with machines?

Casedby Hyehwa explains the process in great detail on the machine's screen, so even I, who am hopeless with machines, could use it easily. The price gap between a regular case and a MagSafe case isn't big and MagSafe protects better, so I chose the MagSafe case.

On-screen guide to making a phone case at Casedby
Uploading and editing a photo at Casedby

Photo the wrong size? AI image extension

What stood out in the process was that a photo that doesn't fit can be stretched out with AI image extension! I used it to extend my photo to fit the phone case, and it extended so naturally that you'd never guess it was AI. The best ✨

Photo before and after applying AI image extension

Big difference between before and after, right?! If the photo's size or quality is poor, the stars beside it go down, so just get it to five stars and make the case. I used a photo I took at Gwanghwamun.

The case comes out as soon as it's made, and it was as exciting and fun as a thrilling prize draw ⭐️ If you're looking for something to do after a Daehak-ro play date, it's an absolute must-stop.

Custom MagSafe case finished with the Gwanghwamun photo
Print quality of the Casedby custom phone case

How good is the print quality, and what does it cost?

The MagSafe case I made at Casedby Hyehwa had great print quality and cost in the ₩20,000s. Can you see how good the print is? 🥹 It looks really premium, not the kind of case where the photo peels off. It's the quality of something bought at a dedicated phone case store!

The higher-resolution the photo, the better, so I recommend using a photo you took yourself rather than one downloaded from the internet.

Full-cover case wrapping the camera lens frame

It even includes the camera lens frame, so full cover is possible~!! Full-cover protection, MagSafe, and a high-quality custom phone case for the ₩20,000s.. ✨ Best value, so I'd recommend it to students too, and if you're wondering what to do in Daehak-ro after a Hyehwa play date, I totally recommend the Casedby phone case shop.

Keepsake photo of the custom phone case on the way to Gwanghwamun

I snapped one as a keepsake on the way to Gwanghwamun haha

Where it is

Casedby Hyehwa케이스드바이 혜화

37 Daemyeong-gil, Jongno-gu, Seoul, South Korea서울특별시 종로구 대명길 37

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