Forget Me Not

'I will never forget you," lovers say to each other. The truth is that sooner or later, almost everyone is forgotten. In fact, many people you've met, from your kindergarten classmates to that sloshed guy at the bar last night, have forgotten you already. If you ran into them on the street today, they might be able to place your face, but probably won't remember your name. That's if you're lucky; most likely they'll just walk on by, oblivious.

Third-year high school student Ainsley Blue Tenbrook (Yoona) is cute and vivacious, and nobody - not even her own father - can remember the least little thing about her.

Ainsley goes through life constantly reintroducing herself to people, until she is ready to give up on the human race altogether.

Then a boy on a bicycle knocks her down and breaks through whatever negative force field surrounds her. The boy, Brett Cole Zedler (Ji Chang Wook), is in the same high school and grade, but a different homeroom class. He becomes her confidante, her defender and, finally, her boyfriend, vowing to never forget her.

Ainsley, the forever stranger, manages to walk into class every day without drawing the attention of her teacher and classmates. She is anonymous, not invisible.

Why has Ainsley been condemned to such a maddening fate?

She tells Brett that at the end of her second year of high school, "my family and friends began to forget me," but that's all the explanation we get. No sign that she somehow incurred the wrath of whatever gods might be out there.