Krystal talked about f(x).

She had an interview for the ending of her drama. During the interview, she talked about f(x)'s comeback and said, "We're continuing to look at the timing and looking for songs. If someone is doing something, we're waiting for them. But we always talk about how we want to promote as f(x)." She added, "There's nothing confirmed. We'll have it when we get the chance."

On the members, she said, "They are like a second family. I believe the people that are left at the end are the members. They are the people who know me the best, and they are people I can tell everything to. When I was young, I didn't know. We are close and like family, and I feel that more lately. We all feel strong by just the existence of f(x). We take care of each other more as we get older. We go to musicals, visit filming sets, and call each other when there's something going on."

Would you like to see an f(x) comeback soon?