I got nose filler in Gangnam around last September. My original nose shape had a slight hump, and the area between the nasal tip and the hump was sunken, so I wanted to fill in the depressed area between the hump and the nasal tip.
I got Yvoire, and I think it was 180,000 won. It was a large hospital, but there were a lot of doctors and many Chinese patients waiting for procedures too...(I should have gone home at this point.) The doctor who performed it looked young, and seemed not very experienced.
What I wanted was to fill in the sunken area along my nasal line, but only the glabella area got filled a lot, and the relatively sunken area looked even more sunken. (Meanwhile, the doctor kept sweating heavily and saying, "Why isn't it filling...")
The anesthesia injection hurt so much, and later I felt like I should just get nose surgery, so I didn't get a retouch. Personally, I don't recommend nose filler.