I recommend the Namyangju Byeolgounbit Clinic.

This is also a place I learned about through a friend's recommendation.

This is a place that performs honest procedures with genuine products and proper quantities, without diluting or using tricks.
They use thorough disinfection and disposable items, and have a daily inspection system, which makes the safety system very reliable.

Additionally, it is equipped with various lasers and advanced treatment devices, making it a place that has already gained word-of-mouth popularity among many people for satisfying results.
The interior was clean and nice.

It was surprising that, unlike other dermatology clinics, they perform mucosal eyeliner and piercing procedures at the dermatology clinic.
I'm considering getting a mucous membrane eyeliner, so I think I should consult with someone.