Bunshinsaba

Bunshinsaba Hangul is a 2004 South Korean horror film directed by Ahn Byeongki.

Lee Yoojin is a transfer student from Seoul, and along with two of her friends, she is constantly being bullied by a group of classmates. One night, Yoojin and her friends decide to place a curse on their enemies by creating a Ouija board on which they write the names of the female bullies. Using the Bunshinsaba curse, her friend warns the others not to open their eyes until the spell is finished. The calling takes effect, and Yoojin, somewhat curious, opens her eyes. To her shock and horror, she sees an image of a palelike dead girl with long hair beside her.The next morning when Yoojin enters the classroom, she discovers the corpse of one of the bullies on top of the desk, with a burned face. Meanwhile, the school hires a volunteer teacher, Lee Eunju, as the new art instructor. She starts to call the roll in her class and stumbles on seat numberas she mentions the name of a deceased girl, Kim Insook. The students are terrified when they hear the name, and rush out of the classroom when they see her talking to thin air. The only one left is Yoojin, who tells Eunju that Kim Insook doesnt exist. Eunju takes another look at the seat and realizes that theres no name at seat number 29. Suddenly, Yoojin sees a figure on Eunjus back. Investigations soon rise as the other three bullies die in the same manner. Finally, Yoojin realizes that the spirit of Kim Insook is possessing her. She was the one who killed all of those bullies, even though she doesnt remember doing it. ........

Source: Wikipedia