I recommend Ilsan Children's Dental Clinic.

I've been going to the same Unjeong Children's Dental Clinic since kindergarten in my old neighborhood (Ilsandong), but when I moved to Siksa-dong, it was too far, so I looked for a nearby clinic. I found a few through recommendations from friends and Naver searches, and finally chose this one. It's a children's dental clinic, so the atmosphere is similar to my old one. The female therapist is very helpful with explanations and doesn't overtreat, so I love it!