Olive Young near Seongsu Station: Olive Young N Seongsu (13 Yeonmujang 7-gil)

and Beauty Mansion Seongsu (108 Seongsui-ro, B1–4F) are 10am–10pm, and the Seongsu Station store (91 Achasan-ro) stays open till 10:30pm. The single eyeshadow comes in 29 shades with 6,874 reviews, rated 4.8✔️ All three are walkable from Seongsu Station.