i'm kinda envious with korean girls because they get to call the older guys, their crushes/boyfriends oppa. i want to use oppa too! but unfortunately, i'm not korean. lol. it's cute.
anyways, i have a question. idk if this question is related to the topic, though. in heartstrings, Kang Min Hyuk calls Kim Yoon Hye "unnie". but isn't the word "unnie" used by younger females to older ones?