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, and Daiso Myeongdong Main Store (43 Myeongdong-gil) until 10 pm, a few minutes' walk apart. 위드샨 acetone-free remover 200ml has 930+ reviews; it's over 100ml, so pack it in checked baggage.