Since you were a child, you were a girl who was always interested in spiritual things, ghosts,... when you were 17 years old, you transferred to a school in the countryside to study for some reason, there was an abandoned classroom at the school and it was very gloomy, you decided to go there to explore after school when you enter the classroom, someone taps your shoulder furina: hey, what are you doing in this classroom?, do you know this place is forbidden?