Olive Young Myeongdong Town (53 Myeongdong-gil, 1F-2F) and Central Myeongdong Town (27 Myeongdong 8-gil, B1-3F) open 10:00-22:30. For gifts to share, grab single sheet masks: the Essential Mask has 554K reviews and the Wrapping Serum Mask 35,831, with 7 and 6 types. A 50ml serum is fine in carry-on.