In Myeongdong, go to Olive Young Myeongdong Town (53 Myeongdong-gil, 1F–2F) or Central Myeongdong Town in M Plaza (27 Myeongdong 8-gil, B1–3F), both open till 10:30 PM. The meringue-like foaming clay enzyme cleanser (6,995 reviews) also comes in a set with a pack brush. There are lots to choose from, so shortlist from this post first.