18+ Not a friend – What do I call her as?

Christmas Eve, at the age of 21. “Geonwoo”, who is single once again this year, didn’t think much about his childhood friend, Haru’s, suggestion of spending the eve together. “Do you… remember when we said that we should help each other out if we are still single by the age of 22?” A racy one-piece of the female friend looks different, it actually looks…