Daelim Warehouse is a 30-minute meander from Seongsu Station and most of the time it doesn't have what you wanted to see. Last month I went for a Bauhaus thing that ended up being a Bauhaus-adjacent thing, and I left annoyed but also fine. That's a Sunday in this neighborhood — vaguely cultured, low-stakes, you'll get a coffee after.
The dress code, if you want to call it that, is monochrome and a little severe. Black and white only. No prints. The point is to look like you're not trying, while clearly having tried. Korean girls do this better than anyone, and the trick is mostly in the proportions: oversized top tucked once at the front, wide trouser breaking just above the ankle, flat shoe. That's the formula and you can run variations on it forever.
I included one thing I wasn't sure about — the silver hoops. You can skip them. But also the outfit is boring without one shiny thing somewhere on your body, so. Up to you.