On the upcoming premiere of 'Amazing f(x)', the f(x) members, who are all now well in their twenties, came up with their bucket lists as previously shown during the preview special. The members jotted down their interesting goals for their New Zealand adventure, including becoming invisible, piloting a plane, conducting a flash mob, scuba diving, sky diving, and more.

But among these goals, the members were most shocked by seeing Krystal writing down, "Retirement," on her list. Krystal explained, "Am I allowed to say this? I don't want to show the public my increasing wrinkles and aging image. I always want to be remembered as being beautiful," revealing why she plans to retire one day soon.

Her members were shocked at first, but soon were accepting of Krystal's wishes, responding, "Despite your young age, it seems like you've been thinking carefully about your future as a celebrity."

Watch the premiere of 'Amazing f(x)' on the 28th at 11PM KST!