ONA Women Spa Dongdaemun (DDP)

Summarised from publicly available information — a women-only private body-scrub studio on the first basement floor of 223 Jangchungdan-ro, 10 m from Exit 8 of Dongdaemun History & Culture Park Station, and the Dongdaemun branch of ONA, which started in Myeongdong. Everything from the soak to the scrub and massage happens in a private room, and it runs entirely by reservation. The menu matches the Myeongdong shop: basic scrub 99,000 won, seaweed scrub 120,000 won, scrub plus massage A course 180,000 won, scrub plus gold massage B course 199,000 won, special package 270,000 won, plus treatments without a soak such as a 40-minute lower-body aroma at 80,000 won, full-body aroma at 120,000 won for 60 minutes or 150,000 won for 90, a 50-minute basic facial at 99,000 won and a 60-minute aqua lymph treatment at 120,000 won. It is open daily from 09:00 to 23:55, runs its Instagram account in English and takes bookings by DM. Reviews keep mentioning the lavender bath soak and welcome drink, the private room where you need not mind anyone else, and the massage that follows the scrub. Groups are accepted, and there is wi-fi, a waiting area and mobile payment. No parking is listed.