In Gwangalli, go to Olive Young Gwangan Beach (235 Gwanganhaebyeon-ro, #101) or

Gwangalli store (153-1 Gwanganhaebyeon-ro), both on the beach road, 11am–11pm. Need it earlier? Millac The Market store opens at 10am (until 11pm). The protein bond treatment (210ml) has 8,161 reviews; over 100ml, so pack it in checked bags. Both are on the beach, easy to pop in on a walk.