Wishing Stairs at AsianDB

Along a wooded path to the school dormitory is a stairway with 28 steps. The stairs are referred to as the Wishing Stairs, because a fox's spirit in the stairs will grant wishes. If someone wishes with all of her heart as she climbs the stairs, a 29th stair will appear and a wish will be granted. However, the students who climb the stairs are not aware that the wishes granted by the fox return as terrible curses...
So-hee and Jin-sung study in the dance department and are best friends. However, So-hee's natural talent at ballet always relegates the hard-working Jin-sung to being second best. Jin-sung's heart leaps when she sees a notice for a Seoul ballet competition for which her school will choose one representative. Soon thereafter, however, she overhears her teachers discussing ways to send So-hee as the school's representative, and without realizing it she finds herself drawn to the Wishing Stairs.

So-hee, who has won the school auditions even though a piece of glass is placed inside her toe shoes, goes in search of Jin-sung. The two of them argue and grow angry. In the midst of their fighting, So-hee falls and tumbles down the stairs. Meanwhile, an overweight art major named Hae-ju who admires the pretty So-hee is the target of many students' ridicule. In the end, Hae-ju suffers from a huge embarrassment in front of many students, and she goes to climb the stairs.

Competing in place of the injured So-hee, Jin-sung wins first prize at the Seoul ballet competition. One night So-hee, who Jin-sung believes was in the hospital, comes to see Jin-sung by climbing through the window of her room in the dormitory. So-hee confesses that she wished to the stairs that she could always be together with Jin-sung. Jin-sung is only sorry for what has happened to So-hee. The following day, she learns that So-hee had already died the previous night before the visit, and she falls into shock. Meanwhile, the formerly overweight Hae-ju becomes ever thinner, and the curses formed by the wishes of the children bring death to the school.