# Walk-in phone case shop in Seongsu: dog photo MagSafe case at Casedby

- By Seaside Windowgazer (https://superchart.com/en/@cafe-windowsill/)
- Written Jul 23, 2026
- Local places › Shopping › Seongdong, Seoul
- Sponsored: This visit was sponsored by the business.
- English edition: https://superchart.com/en/@cafe-windowsill/seongsu-custom-phone-case-workshop-ef2d/
- Also in: [한국어](https://superchart.com/ko/@cafe-windowsill/seongsu-custom-phone-case-workshop-ef2d/index.md) · [日本語](https://superchart.com/ja/@cafe-windowsill/seongsu-custom-phone-case-workshop-ef2d/index.md)

## In short

Casedby Seongsu is a 24-hour unmanned custom phone case workshop at 2 Seongsui-ro 12-gil, near Seongsu Station in Seoul. The writer walked in on a weekday afternoon without a reservation and used the kiosk and QR design page to make two cases, one with an artist's design and one with a photo of their dog, and found the finished cases sturdy and neatly finished. At ₩28,700 for a custom MagSafe case (₩22,800 for a clear case), Casedby Seongsu is a fair-priced pick for a Seongsu date or anyone who wants a one-of-a-kind phone case.

## Good to know

- **Address**: 2 Seongsui-ro 12-gil, Seongdong-gu, Seoul
- **Hours**: Open 24 hours, unstaffed
- **Reservation**: Not needed (no wait on a weekday around 3–4 PM)
- **Clear case**: ₩22,800
- **MagSafe case**: ₩28,700
- **Other items**: Keyrings and other goods (paid at the kiosk)
- **Price reference**: ₩28,700 ≈ $21.5 · ₩22,800 ≈ $17 (2026-10-10)

*as written by the visitor on Jul 23, 2026*

![Main photo of a custom phone case from Casedby Seongsu](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-01-1fb0q-1200.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

## What is Casedby Seongsu?

Casedby Seongsu is a 24-hour unmanned workshop near Seongsu Station where you design your own phone case. I've been going to Seongsu a lot lately, and while looking for places to visit I found somewhere new. Instead of buying an ordinary phone case, you can design your very own at this unmanned workshop!!

Since it's unmanned, it's no pressure even if you go alone, and with 24-hour opening there's no time limit, which sounds really convenient. It seemed good for anyone looking for a fun Seongsu date idea, and for people like me who wanted to make a custom case, so I went to check it out. Haha

![Unmanned Casedby Seongsu store on Seongsui-ro 12-gil](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-02-1ic3k-900.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

> 📍 Casedby Seongsu · 2 Seongsui-ro 12-gil, Seongdong-gu, Seoul / 🕒 Open 24 hours, unmanned

## Do you need a reservation at Casedby Seongsu?

No reservation was needed at Casedby Seongsu. I went on a weekday around 3–4 PM and could use it right away with no wait. I had one reason for going! Phone cases are pretty expensive these days (I especially wanted a MagSafe one..), and if I'm buying one anyway, I wanted my own design rather than a common one.

Then I found out about Casedby near Seongsu Station, and what I liked most was that you can design and make it yourself. Using it was simpler than I expected.

## How to make a custom phone case, and prices

At the Casedby kiosk, you choose either a clear case (₩22,800) or a MagSafe case (₩28,700), pick your phone model, and then start designing with a QR code. First, press the custom order start button,

![Casedby kiosk screen to start a custom order](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-03-u7bxs-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

choose the product you want on the unmanned kiosk, either the clear case (₩22,800) or the MagSafe case (₩28,700),

![Kiosk step for choosing a clear or MagSafe case](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-04-ga3e0-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

and pick your phone model,

![Kiosk step for selecting the phone model](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-05-1105h-900.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

and a QR code is generated.

![QR code generated after choosing the phone model](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-06-tovf8-966.webp)

### Choose an artist design or your own photo on the QR design page

Scan the QR code with your phone and the design page opens. This is where you really start making your own case. You can pick one of the artists' designs and order that,

![Phone case design page that opens after scanning the QR code](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-07-b1eb6-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

or upload your own photo to make a one-of-a-kind custom case.

![Design page where you can choose an artist design](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-08-1iykw-966.webp)

As the instructions say, you can import photos freely, and there's a background removal (cutout) function too, so I was done faster than I expected while arranging things.

![Guide to making a custom case by uploading your own photo](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-09-13d0c-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

![Design screen with photo placement and background removal](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-10-1naum-966.webp)

I fumbled around a little at first, but after pressing a few buttons it wasn't hard at all. I made one with an artist's design,

![Designing the case on a phone](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-11-12hbv-m-966.webp)

and designed the other myself with a photo of our dog. Haha

![Phone case design made from an artist's work](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-12-j0k4j-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

Once you finish designing and pay, production starts!

![Phone case designed with a photo of the writer's dog](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-13-1wppu-966.webp)

Samples of all the artists' works are displayed in the store, so you can see the real thing before choosing!

![Sample cases of artists' works displayed in the store](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-14-5u1rd-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

## Can you buy keyrings and goods at Casedby too?

Casedby Seongsu sells not only phone cases but also keyrings and various other goods.

![Keyrings and goods sold at Casedby](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-15-melwk-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

You can pay for these right at the kiosk too.

![Keyring goods corner paid for at the kiosk](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-16-1ye1k-966.webp)

I only made phone cases this time, but I thought I'd like to make a keyring as well next time.

![Inside Casedby Seongsu](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-17-980ys-900.webp)

![Casedby store while waiting for the case to be made](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-18-15119-966.webp)

## How was the quality of the finished custom case?

The custom cases made at Casedby were sturdier than I expected, with a clean finish. Ta-da, this is what comes out when it's done!

![Finished custom phone case after production](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-19-m93aj-900.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

I was really happy with the finished case. It was sturdier than I expected and the finish was clean.

![Finished case that is sturdy with a clean finish](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-20-18l37-966.webp)

I also liked how practical it is, since the design protects the camera lenses too. Best of all, it's a phone case of my own that you can't easily find anywhere else. Haha

![Finished custom case that also protects the camera lenses](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-21-licfo-966.webp)

![Phone with the finished case in the writer's own design](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-22-1sdkz-m-966.webp)

I think it would be lovely to make matching custom cases as a couple on a Seongsu date~

## Pros and cons of a 24-hour unmanned workshop

What I personally liked most about Casedby Seongsu was that it's unmanned and open 24 hours. There's no need to reserve, and you can drop by easily late at night or at an awkward hour, which is a big plus.

Since everyone does the design on their own phone, I also felt there'd hardly be any waiting even if it gets a bit crowded. That said, it might not be easy for people who have trouble using a smartphone..? The store was clean and cool, so it was nice for taking your time with the design.

![Clean, cool Casedby Seongsu store](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-23-1c4oq-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

## Is a ₩28,700 custom MagSafe case a fair price?

Considering what MagSafe phone cases cost these days, I felt ₩28,700 for a Casedby custom case where you can add your own design is a pretty fair price. I'd recommend it to people who love custom cases or want to make a cute, special phone case.

The artists' designs are really varied too, so cat lovers and fans of cute illustrations should be happy.

![Varied artist design cases including cats and illustrations](https://img.superchart.com/images/seongsu-custom-phone-case-workshop/seongsu-custom-phone-case-workshop-24-x34gc-966.webp)
*Places to visit in Seongsu: a workshop date making a phone case*

If you're looking for places to visit in Seongsu, or a different kind of Seongsu date idea, Casedby Seongsu is worth a visit. It's fun to make yourself, and you can use the finished case for a long time, so my satisfaction was really high.

## Where it is

- Casedby Seongsu (케이스드바이)
- 2 Seongsui-ro 12-gil, Seongdong-gu, Seoul, South Korea
- 서울특별시 성동구 성수이로12길 2
- 37.5399179, 127.0556832
- Google Maps: https://www.google.com/maps/search/%EC%BC%80%EC%9D%B4%EC%8A%A4%EB%93%9C%EB%B0%94%EC%9D%B4/@37.5399179,127.0556832,17z

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