Fashion in Korea today for girls has some variety, but it generally encompasses the following traits: feminine, cute/lovely, and minimal. Of course, you do have some odd ones out, but that is generally for Korean entertainment when they take fashion to a whole new level.
Korean teens love to be cute. Their outfits can range from ruffle skirts to over-sized colourful sweaters. Anything that makes them look youthful and innocent.
For women in their 20s or older, their outfits are more sophisticated and natural. From what I observe, they like to pair a very nice skirt and tights with simple flats or heels. On top, they like to have cardigans or blazers as well as a long necklace to add to the touch.