I recommend Wonju A-Plus Dental Clinic.

Even adults tend to feel hesitant and scared to visit the dentist... So, I looked up places I passed by and visited one, and just as the reviews said, they were very kind, which immediately put me at ease... They also explained everything thoroughly, so I felt good about it. The environment itself has a bright atmosphere, making me feel more comfortable about going. I also appreciated that the scaling was done painlessly.