Natural-looking breast augmentation for petite Asian body frame?

I am a petite woman (158cm, 45kg) and currently an A cup. I want to get breast augmentation in Korea but I am scared of looking disproportionate. I have seen too many cases where the results look obviously fake on a small frame. Can anyone recommend Korean clinics that specialize in natural-looking augmentation for petite women? What implant size would give me a natural C cup look? Should I consider fat transfer instead of implants given my small frame? Any advice from petite women who have had this surgery in Korea would be greatly appreciated!