In Myeongdong, Olive Young Myeongdong Town (53 Myeongdong-gil, 1F-2F) and

Central Myeongdong Town (M Plaza, 27 Myeongdong 8-gil, B1-3F) are open until 10:30 pm. Fillimilli Brush & Puff Cleansing Soap comes with a pad (3.4K+ reviews); it's a solid, so carry-on is fine. Wash at the hotel, dry by the window, and it's ready next morning.