Chapter 25: Sorrow hits like a frieght train.

Shota Aizawa, known to most as Eraserhead, rubbed his tired eyes as he begrudgingly stepped off the bus. The events of the past few days had taken a toll on his usually stoic demeanor. The elusive new villain with green hair remained an enigma, a puzzle piece in a city teeming with chaos. Aizawa had spent countless hours trying to piece together information, but the shadows protected their own.

The bus ride had been a brief respite from the chaos, a moment of reprieve that was abruptly shattered when they arrived at the Unforeseen Simulation Joint. He couldn't escape the looming sense of dread that accompanied this place, a foreboding premonition of the events about to unfold.

As the class disembarked, Aizawa surveyed his students. Class 1-A, a motley crew of potential heroes and, in his eyes, trouble waiting to happen. Yesterday's intrusion into the school had only added to the headaches he endured as their teacher. Someone had infiltrated All Might's desk, and the ramifications of that act remained unknown.

He sighed, exhaling the weariness that clung to him like a second skin. Aizawa was accustomed to the relentless challenges that came with being a hero and a teacher, but the recent string of incidents had pushed him to the brink.

The students, blissfully unaware of the burdens weighing on their teacher, chattered excitedly as they entered the USJ. Aizawa couldn't afford to let his guard down, especially in a simulated environment that mirrored the unpredictable nature of villain attacks.

Little did he know that the sorrow he felt would soon escalate into a crisis that would challenge the very core of his abilities as a hero. The USJ, once a training ground, was about to become a battleground where heroes would be forged or broken in the crucible of chaos.

Aizawa observed his students with a practiced eye, scanning their faces for any signs of unease or apprehension. The USJ was designed to prepare young heroes for the unpredictable challenges they would face in the real world, but today's lesson was about to take an unforeseen turn.

The students marveled at the intricacies of the facility, their excitement evident as they took in the different disaster scenarios. The Entrance, a gateway to the challenges that awaited them, loomed before them. Aizawa, however, couldn't shake the feeling that something was amiss.

"Alright, listen up," he called out to his class, gathering their attention. "This is a crucial exercise. Each of you will face different disaster scenarios within the USJ. Adapt, work together, and remember your training."

As they moved forward, the students entered the Central Plaza, a nexus that connected the various training grounds. Aizawa's eyes narrowed as he monitored their movements, a sense of vigilance etched into his features.

The Ruins Zone, Landslide Zone, Mountain Zone, Conflagration Zone, Flood Zone, and Downpour Zone awaited them, each presenting a unique challenge to test their abilities. Little did they know that the real trial was about to begin, one that would push them beyond their limits.

Aizawa's focus intensified, his capture weapon ready to spring into action at a moment's notice. The USJ, designed for controlled chaos, was now a powder keg waiting to explode. The shadows whispered of impending danger, and Aizawa steeled himself for whatever calamity was about to unfold.

Thirteen's spacesuit-clad figure stood before the students, delivering the standard speech about the potential dangers of their quirks and the importance of using them responsibly. Ochaco Uraraka, in particular, seemed captivated by the presence of the Space Hero.

Aizawa observed the hero with a hint of skepticism, his capture weapon at the ready. The absence of All Might, who was supposed to be present for this exercise, raised concerns in his mind. Thirteen's three-finger gesture signaled that the time for his entrance had passed, and Aizawa couldn't shake the feeling that something unexpected was about to unfold.

As Thirteen continued with the safety briefing, Bakugo's mind briefly flickered with a memory, a distant familiarity. However, the urgency of the situation pushed the thought aside, and he focused on the impending exercise.

Aizawa's gaze remained sharp and vigilant, his eyes narrowing as he scanned the students. The USJ, designed for controlled chaos, was now tinged with an unsettling atmosphere. The hero instructor braced himself for the unpredictable challenges that awaited his class, unaware that the real threat was lurking just beyond the shadows.

Eraserhead's eyes narrowed as he witnessed the sudden appearance of the villains through the warpgate. The leader, adorned in a black hoodie with blue hair and a severed hand covering part of his face, exuded a menacing presence. Two formidable allies flanked him—one made of smoke and the other a grotesque creature with razor-sharp teeth and an exposed brain.

The students, initially confused by the unexpected intrusion, were now faced with the grim reality that real villains had infiltrated the USJ. Kirishima's misguided assumption about it being part of a training session highlighted the shock that rippled through the class.

Eraserhead wasted no time. "Thirteen, protect the students. I'll handle the villains," he declared with a sense of urgency. Launching himself off the giant staircase, he descended towards the intruders, prepared to confront the threat head-on.

As he approached the group, Eraserhead's capture weapon activated, ready to erase their quirks. He had dealt with many villains in the past, but something about this situation felt different. Unbeknownst to him, a greater evil lurked in the shadows, its presence seeping into the USJ, though Aizawa dismissed it as mere nerves.

The ominous atmosphere within the dome heightened, setting the stage for a clash between hero and villain, with the students caught in the crossfire.