Purpose built as a study cafe. Has 3 floors and nearly all seats have plugs. You can order at a tablet on each floor

A spacious place dedicated for people working. It's on 3 different floors and you can indeed order from each of them and pick up your order on floor 2. Music is not too loud and people are quiet, perfect to focus. There is also good good options and good drinks. The price of drinks are a tiny bit pricier, but totally worth it for the place. It opens very late so it's cool. The Sinchon area is very nice to visit :) Edit: that's my go-to place