Infinite Instances of the Onizuka Class

One day, before morning class, every student in Onizuka's class found something that didn't belong to them in their dorm room.

Some received handguns, some received unidentified liquids, some received walkie-talkies, and some received flashlights... One student even received dozens of 3D printers, leaving no room to stand in their room.

To be safe, everyone brought their newly received items to the classroom.

The student who had received the printers looked miserable, having called a friend to help carry them over in several trips.

Instructor Onizuka stood at the lectern, his expression dark. Everyone saw a bottle of dark red human blood and a card on the lectern in front of him. The label on the bottle was unsettling: Blood from a student in Onizuka's class. Has exorcism properties and can be tested for DNA.

The card bore some words in black and red, but they were too blurry to read.

After explaining the situation, Onizuka told the students who had arrived to put all the items they had received at the front of the classroom. The prank had already been reported, and a specialist team was investigating.

Since the security cameras had been hacked, no one knew what had happened in the dormitory building.

When the five arrived in class, they sensed something strange in the atmosphere. Before they could ask, Instructor Onizuka told them to put the items from their dorm rooms on the lectern.

“What items?”

The five looked at each other.

“You... You didn't get anything?” asked one of the students who had arrived early, nervously.

“You mean those strange things on the lectern?” Matsuda Jinpei asked.

The students hurriedly nodded.

“No?” The five took their seats one after another, and Date Wataru scratched his head.

The students seated behind Rei Furuya made horrified expressions and frantically blinked at Instructor Onizuka, but Onizuka was focused on the bottle of blood in his hand and didn't notice.

Hagiwara Kenji looked curious. “Did something happen? Did you deliberately leave us out of the fun?”

Ignoring Hagiwara's attempt to lighten the mood, Onizuka called on his favorite top student. “Furuya.”

Rei Furuya answered loudly: “Yes!”

“Has anything happened to you lately?”

“No!”

Instructor Onizuka picked up the bottle of dark red liquid. “All right, but the hospital's test report says this is your blood.”

“What?!”

Hiromitsu Morofushi leaped out of his seat and appeared beside Rei Furuya in an instant, starting to examine him without a word.

Since it was still early before class, Onizuka said nothing. He simply asked again, “Does he have any injuries?”

Hiromitsu Morofushi didn't answer. He stared fixedly at the words appearing on Rei Furuya's neck beneath his blond hair and read them aloud: “D-o-n-'t, t-u-r-n, a-r-o-u-n-d?”

He was the first to react. He grabbed Rei Furuya, who was reflexively about to look behind himself. “Zero, don't move!”

Matsuda Jinpei, who was closest to Rei Furuya's seat, stood up too and looked at the back of Rei Furuya's head. The words looked as if they had just been carved in with a very sharp knife. A moment later, blood began to flow, soaking the back of his uniform, which quickly turned red.

Rei Furuya looked bewildered and helpless, his neck stiff as he quietly cried out, “Ah, it hurts, it hurts, it hurts, it hurts, it hurts.”

Instructor Onizuka crossed the room in three quick strides, approaching with a grave expression to examine the injury. He happened to see the final character appear. The wound healed quickly, leaving only a scar: Don't turn around. Death is right behind you.

Original setting: There are 30 students and one instructor in the class. Everyone except the five received physical objects.

Theme: The whole class is entering an endless instance!