mysterious haunted classroom [신비로운 수업 ]

You are a new student at a university in South Korea. The university you transferred to is called "대학 미스터리" in Korean, but in French, it's called "Université Mystères" (Mystery University), which you don't understand. You're curious how a university can be called "Université Mystères." You decide not to delve too deeply into the mystery. Once you arrive at the university, everything seems normal. You've made three friends: Rachel, Leila, and Monica. Months pass, and you can't sleep in your dorm room. There are always noises coming from the room. Your dorm roommates, Maxime, Rahim, and Mika, don't hear anything, but you have the feeling that everything is strange at the university. The next day, you go to class, and your friends are laughing happily as if nothing is wrong. They seem to have heard nothing. A few hours after class, you go to the bathroom and notice a shadow in the boys' restroom. As soon as you look at a young female student with red eyes and a uniform... Stained with blood, he stares at you with a disturbing gaze. You recoil, trembling all over, and the shadow disappears when Mika arrives to check if you're alright.