Hello Kitty phone case shop in Seongsu: travel drawing cases, Casedby
In short
Casedby Seongsu is a 24-hour unmanned custom phone case studio at 2 Seongsui-ro 12-gil, Seongdong-gu, Seoul. The writer and their partner each made a MagSafe case at Casedby Seongsu, one from a Hello Kitty wallpaper and one from a Hong Kong trip photo turned into a drawing, and the writer was happy with how sharp the prints came out. For a hands-on date in Seongsu or a couple or gift phone case, Casedby Seongsu is a great fit.

Good to know
- Getting there
- Seongsu Station Exit 3 · 9-min walk (store listing, Oct 7, 2026)
- Location
- 2 Seongsui-ro 12-gil, Seongdong-gu, Seoul
- Hours
- Open 24 hours, unstaffed
- How to order
- Scan the QR code on the screen → choose your phone model → choose a case type → add your image or design → pay, and printing starts right away
- MagSafe
- MagSafe option available
as written by the visitor on Jun 9, 2026
What is Casedby Seongsu?
Casedby Seongsu is a custom phone case studio at 2 Seongsui-ro 12-gil, Seongdong-gu, Seoul, and it's unmanned and open 24 hours. You can make your own phone case from a photo or image, so it looked like a good brand for couple cases or gifts.
When I pick a phone case these days, I don't just look at whether it's pretty. I wonder if I'll get tired of it, if it suits my phone, and how it feels when I actually carry it around. Changing just the case can change the whole mood, right? Like clothes or a bag, a phone case quietly affects your image. So this time I tried Casedby, a brand where you can make a case with the design you want.

Why the 24-hour unmanned setup is nice
Because Casedby Seongsu is unmanned and open 24 hours, it was easy to visit whenever I wanted, and I could browse designs slowly without feeling watched by staff. Seongsu is full of cafés, select shops and prop shops, so it's a great neighborhood for dates or hanging out with friends, right? For someone like me who takes forever to choose one design, the unmanned format actually felt more comfortable haha



What photos can you use for a case?
Casedby is a custom case brand where you can make a phone case from any image or design you like. Judging by the examples hanging on the shop walls, lots of people made goods-style cases with photos of their favorite celebrities.



Ready-made cases are pretty too, but sometimes you want a case with your own mood or photo, right? Travel photos, images in colors you love, pet photos, couple photos: a case made from something meaningful is a keepsake in itself haha

How do you order at Casedby?
Ordering at Casedby Seongsu goes like this: scan the QR code on the screen, then choose your phone model, choose the case type, and apply your image or design. The process wasn't difficult.
- Scan the QR code on the screen
- Choose your phone model
- Choose the case type
- Apply your image or design
- Pay, and printing starts right away



Choosing a Hello Kitty design
I really love Hello Kitty, so I agonized over which Hello Kitty wallpaper to pick lol. Should I go with a simply cute design, or a calmer one that suits my image more? It was a harder decision than I expected. Our little secret: I asked ChatGPT which one suited me best and thought about it for ages haha


Once you pick the final design and pay, printing starts right away. It doesn't feel like just buying a product; the design I chose myself actually becomes a case, so even the waiting was fun. A great Seongsu date course too!


How was the print sharpness of the custom case?
The image on the case from Casedby came out clean, and I was happy with the print sharpness. It was the first thing I checked when I got the case, because with custom cases the real thing can look different from the image on a product page, so I was a little worried.


My partner's Hong Kong trip photo as a drawing
My partner's design is a photo they took on a Hong Kong trip, which they asked ChatGPT to turn into a drawing haha

The image is really sharp, isn't it? Using a trip photo makes it not just a pretty case but a case full of memories!

Can Casedby custom cases be MagSafe?
Yes, Casedby lets you choose MagSafe for custom phone cases too! I'm someone who must have MagSafe, so whether a case supports it matters a lot. No matter how pretty a case is, if it isn't MagSafe I end up not reaching for it. A custom case that supports MagSafe was a big plus.
Why I recommend it as a hands-on date in Seongsu
At Casedby Seongsu you can make a phone case you can actually use from an image you chose yourself, which makes it a perfect hands-on date course in Seongsu. A pet photo works, and so does an image of a favorite character or mood, so it can also make a personal gift.
I made mine with a Hello Kitty design and my partner used a Hong Kong trip photo, and we were both happier because each case reflected our own taste. If you're looking for a slightly special date in Seongsu, or thinking about couple cases or a gift case, how about Casedby, where you can make a custom phone case?
Where it is
2 Seongsui-ro 12-gil, Seongdong-gu, Seoul, South Korea서울특별시 성동구 성수이로12길 2
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