Reborn As An Extra : I'm gonna mess up everything

Corin ran through the empty corridors of the academy, his breath ragged and his body drenched in sweat. His vision was still clouded, the world around him painted in an unnatural, blood-red hue. He stumbled as he teleported again, his mana nearly drained from overuse. Slowly, the berserk rage that had consumed him began to wane, allowing fragments of clarity to seep into his mind.

"What happened? Why am I running?" he wondered, his thoughts hazy and jumbled. His heart pounded in his chest as he tried to piece together the events of the past few hours. "Everything feels so red... so chaotic... I can't remember anything clearly."

As he sprinted through the dimly lit hallway, he spotted a boy ahead of him—blue-haired and blue-eyed. The boy moved cautiously, his body tense with fear. When their eyes met, the boy froze in place, his face turning ghostly pale, and his entire body began to tremble.

"Ethan?" Corin's muddled thoughts latched onto the name as it echoed in his head. The sight of the boy triggered something deep within him, an uncontrollable fury rising like a tidal wave. "That's right... Ethan! I remember now. He's the reason for all this! I'll kill him! I have to kill Ethan to reclaim my honor!"

Without hesitation, Corin lunged forward, his sharp nails glowing faintly under the dim lights. In one swift motion, he drove them deep into the boy's abdomen. Blood sprayed out like a crimson fountain, splattering onto Corin's face and hands. The boy didn't even have a chance to scream before his body collapsed lifelessly onto the cold, hard floor.

Corin stared down at the corpse, his chest heaving. A twisted grin spread across his face. "Hehehe... Ethan is dead. I killed him!" he bellowed, his voice filled with savage satisfaction. "Finally! I've done it!"

But his moment of triumph was short-lived. A commanding voice rang out from behind him. "Corin! Surrender now, or we'll have no choice but to end this!"

Corin spun around, his blood-soaked hands trembling. His red-tinted vision revealed three figures standing at the end of the corridor. To his shock, they all looked like Ethan—but with slight differences. One was taller and leaner, another shorter and stockier, and the third appeared almost identical to the boy he had just killed.

"What?! More Ethans?!" Corin growled, his rage bubbling to the surface once again. He clenched his fists, his sharp claws glinting menacingly. "Is this some kind of trick?! Fine! If you want to keep coming, I'll kill every single Ethan that crosses my path!"

His muscles tensed, and he prepared to charge at the three figures. His bloodlust blinded him to the truth. The boy he had just killed wasn't Ethan at all—it was another student, an innocent bystander who had the misfortune of crossing Corin's path. And the three figures before him weren't Ethan either. They were academy teachers, two men and one woman, who had tracked Corin down to stop his rampage.

But in his berserk state, Corin's mind twisted reality. Every person he saw became Ethan. His hatred consumed him, leaving no room for reason or logic. All he could see was the face of the boy he blamed for everything, and all he could think about was spilling more blood.

Corin charged forward like a wild beast, baring his fangs, his body trembling with uncontrollable rage. His target was clear—to kill the "Ethan" in front of him, no matter the cost. 

The female teacher stepped forward, her gaze cold and unwavering. "It seems like I have no choice but to stop you," she said firmly. 

With a swift, precise motion, her sword sliced through the air and severed Corin's arm. Blood sprayed onto the floor, but she showed no hesitation. 

Corin gasped, stumbling back as pain shot through him. His eyes widened in disbelief. "This Ethan is so powerful… I have to retreat!" he thought, his mind still unable to comprehend reality.