In Myeongdong, Daiso Myeongdong main store (43 Myeongdong-gil) and Olive Young

Myeongdong Town (53 Myeongdong-gil, 1F-2F) are a minute apart and both open past 10 pm. Daiso's Goodfeel overnight pants (L, 2 pack) are ₩2,000 with 1,092 reviews, handy before a night bus or long ride.