(Time skip to Sunday.)
At Elite class
Ms. Kayede: Okay class! Shall we begin? I hope everyone is here, right?
Student 1: Ma'am, Irina is not here.
Student 2: We haven't seen her since morning.
Ms. Kayede: She will come. Let's start the class. I will be showing you a video now. Listen carefully to what is being said. They will be using advanced words that will be hard to grasp.
The video starts, and all the students pay attention to it when suddenly the screen starts to glitch.
Female voice: HELP!! HELP ME!! PLEASE, SOMEONE!!
All the students get scared and start to panic. Irina, trapped inside a glass cage, is shown on the screen. On the glass cage, there is a math equation written.
Ms. Kayede: Tanjiro, go to the staff room and inform the other teachers.
Tanjiro: Yes, ma'am.
He leaves the class and rushes to the staff room. But suddenly someone starts talking through the PA system. It was a male voice.
The mysterious voice said, "Good morning, students! Today you will be taking a test. The rules are simple. Questions will be given, and they must be answered. You are all elite students, so they will be easy for you. But if you give the wrong answer or take more than the allocated time, then the students here will die one by one. Don't try to leave the school. I repeat, do not leave the school. The first question is already given, as you can see on the glass cage. Answer it, and you will be able to save the girl's life. Good Luck!
(At the staff room)
Tanjiro: Sir, there is an emergent
Mr. Jinta: Yes, we know.
Mr. Asano: None of the phones are working. The person has cut off the line. No incoming, no outgoing. Come, let's go to class.
Tanjiro and the other two teachers rush back to class.
(in the classroom)
Mr. Jinta: Students, please don't panic."
Student 1: How can we not panic, bastard?
Student 2 (sobbing): A student is about to die; how can you expect us to stay calm?
Student 3: YA, HOW DARE YOU SCREAM AT THE TEACHER LIKE THAT?"
Student 1: No one ordered a glass of your opinion!
Student 3: You bastard!
The students start fighting among themselves. No one notices the glass cage filling with water. Soon a girl lets out a scream, which silences the class. The girl on the screen drowned to death.