I had it done at D(ana) Clinic through an event in the 100,000 KRW range. Since it was cheap, I think the longevity is about half a year at the nasal tip and about 1 year on the nasal bridge.
The doctor tends to do it naturally and well, so I was satisfied and went back a few more times. Especially when injecting the nasal tip, they also do the inside of the nose, so overall they seem good at making the nasal bridge look high and defined. I think it's recommendable for students who are getting filler for the first time and feel burdened by expensive options.
Like 0