Hongdae Daiso: Hongdae 2nd Store (182 Yanghwa-ro) and Hongik Univ. Entrance Store (25 Hongik-ro), 10 am-10 pm. The 2nd Store is about 100m from Hongik Univ. Station. The 7cm spiky massage ball is ₩1,000 with 1K+ orders, light and tiny in a suitcase. The Entrance Store is on Hongik-ro, on the way to the university's main gate.