At Gangnam Station, Olive Young Central Gangnam Town (403 Gangnam-daero, B1–4F) is open 10am–10:30pm. Olive Young Gangnam Town (429 Gangnam-daero, 1F–3F) is nearby too. The gel toner pads come as 70 + 70 refill (2.4K reviews). Bag the pads so they don't leak.