In Seongsu: Daiso Hanssem Mart Seongsu (118 Seongsui-ro) is open 6am–11pm, while nearby Daiso Seongsu 2-ga (106 Seongdeokjeong-gil) and Ttukseom Station (6 Achasan-ro) open at 10am. White bubble wrap bags (16.5 x 23cm) are ₩1,000 for 5, a good fit for mask boxes and gifts. Go at 6am and you will likely skip the crowds.
Daiso Mall
Daiso MallDaiso Mall