Kino L.
Google
I tried a few record stores in Seoul and this was easily the best, great store, cool vibe, very cosy. Good selection of rock and pop, Japanese city pop and Korean records. The guy in the store was so helpful and kind. I ended up just buying the record he was playing at the store, I was enjoying it so much.
100% I will go back next time I'm in Seoul and pick up some more records.