Whispering Corridors
여고괴담 (original)
Starring Lee Mi-yeon, Kim Gyu-ri, Choi Kang-hee, Park Jin-hee, Yoon Ji-hye, Kim Min-jung, Lee Yong-nyeo, Kim Yu-seok, Yoo Yeon-soo, Kim Roi-ha
It's a drama and horror movie, and has a rating of 6 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Italy.