Wishing Stairs
여고괴담 3: 여우계단 (original)
A staircase leading to a schoolgirls' dormitory usually has 28 steps, but sometimes a 29th step appears. Any wish you make while standing on this step comes true, even if it must come true in the most horrific way possible.
Starring Song Ji-hyo, Park Han-byul, Jo An, Park Ji-yeon, Gong Sang-a, Hong Soo-ah, Kwak Ji-min, Moon Jeong-hee, Wu-jin Jang, Joo Eun
It's a drama and horror movie, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Netherlands.