Olive Young Myeongdong Town (53 Myeongdong-gil, 1F-2F) is open until 10:30 pm

and Daiso Myeongdong Main Store (43 Myeongdong-gil) until 10 pm, a short walk apart. For lash care, Refilled Cytokine Eyelash Dual Ampoule (10ml) has 9.5K+ reviews. Mascara and ampoule are tiny, fine in your 1L carry-on bag.