A Blood Pledge
여고괴담 5: 동반자살 (original)
Strange rumors start to spread at the catholic girls’ high school after Unjoo committed suicide one night. Unjoo’s younger sister Jung-un who attends the same school gets suspicious about Unjoo’s death. After persistent investigation, Jung-un finds out that on the night of the incident, Soy, Eugene, Eun-young, Unjoo, the four of them had tried to commit a joint suicide after making a vow on blood. But the three are still alive, and only Unjoo had died. the desire, jealousy, and lies behind the pledge of death between the four girls are revealed, along with the hidden truth behind Unjoo’s suicide.
Starring Oh Yeon-seo, Jang Kyoung-ah, Son Eun-seo, Song Chae-yun, Yoo Dam-hee, Park Ga-hee, Park Jung-yoon, Kang Byul, Hwang Seung-eon, Jung Hye-in
It's a drama and horror movie, and has a rating of 5.6 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Norway.