Class 1-A was having a normal day at the U.A High school when all of a sudden, they noticed something missing. "Where's Denki?" asked Mina, glancing around the classroom. None of them have seen him, and his usually lively nature was missed.

They decided to go look for him, but as they stepped out of the classroom, they were immediately transported to an unfamiliar place. A desolate, unearthly world that didn't resemble anything they have ever seen before.

Before they could question what was happening, a small child with a striped shirt appeared in front of them. It was a young Denki, although, it was as if they were seeing a completely different person.

Denki, or rather, 'Frisk,' was standing in front of a terrified flower with a face, named Flowey. The flower's demeanor reminded them of Bakugou, hard and tough on the outside but soft on the inside.

"Disappointment takes us by surprise, even though by now we should've realized," Frisk said, an eerie calmness in his voice. The souls of numerous monsters appeared behind him, their expressions holding a fearful anticipation.

"Everyone is dumb," he continued in a monotone, and a cold chill went down their spines. This wasn't the Denki they knew. This was someone else, someone with a darker and colder demeanor.

Suddenly, they were whisked away to a different scene. Frisk was now standing off against a humanoid goat. She was a kind-hearted woman named Toriel, recognized by some of them as what they'd name 'Goat Mom.'

She fought bravely, but Frisk was too powerful. He didn't hesitate before landing the final blow. Toriel turned to dust, and he moved on without a second glance.

They teleported again. This time, Frisk was in a snowy landscape, facing a comical skeleton named Papyrus. He, too, fell to Frisk's relentless attack. Again, they heard the haunting echo, "everyone is dumb."

The next scene showed a fierce warrior, Undyne. She was a well-respected fighter with a strong will. Surely, she could defeat Frisk. But, to their dismay, she, too, was defeated easily and turned to dust.

The final scene was the most chilling. A lazy skeleton named Sans tried to convince Frisk to RESET. The latter, however, was too far gone. With a taunting smile, Frisk declared once more "everyone is dumb."

"There must be something in the-", but before Frisk could finish his sentence, they were teleported back to the U.A. They were back in the safety of their school, but the images of Frisk’s actions were still fresh in their minds.

They were silent, each trying to process what they had just witnessed. Denki, kind and fun-loving Denki, doing such horrible things. It was a side of him they never knew existed.

They never realized he was capable of such actions, or that he had such a tragic past. It was hard to believe that their cheerful friend was once the child who had gone on a destructive path.

The rest of the day went by in a daze. Denki returned, acting as usual, unaware of what they had seen. They didn't want to confront him, at least not yet, but they knew they had to understand him better.

This experience changed Class 1-A forever. They realized that everyone has a past, some darker than others, and that it was important to support and understand each other. After all, they were a team, a family.

From that day forward, they treated Denki with a bit more care, a bit more understanding. He didn't have to face his past alone anymore, because he had his friends with him.

And although they still had a long way to go in understanding the pain and sorrow that Denki had experienced, they knew they were willing to face it together. Because, in the end, they were not just classmates, but a family.

In their own way, they silently vowed to protect him, to protect each other from whatever hardships that might come their way. Because that's what friends do, they stick together. And the bonds they shared were now stronger than ever.

So, despite the frightful incident, Class 1-A took it as a lesson. A lesson about understanding and compassion. It may have been a hard pill to swallow, but it was a step towards their journey of becoming true heroes.

And as for Denki, he might not know that his friends had seen his past, but he did notice the change. The slight increase in care and understanding, the tighter bonds they shared. And he was grateful for it. Because it meant that he was not alone.

Because it meant that despite his past, despite what he had done, he was accepted for who he was. Because it meant that he had found a family in Class 1-A. And for once, he was glad that he was not alone.

This incident not only brought them closer together but also taught them a valuable lesson. Understanding, compassion, and acceptance are what define true heroism. And Class 1-A was on their way to becoming just that.

They had seen the darkest part of Denki's past, but they were ready to stand by him in the present and future. Because they were friends. Because they were family. And because they were on the path to becoming true heroes.

In the end, they realized it was not about judging each other by their pasts. It was about understanding and accepting who they were and who they are becoming. And it is this realization that marked their growth as individuals and as heroes.

For Class 1-A, it became a memory. An incident they would never forget, one that helped shape their understanding of the world and themselves. And from that day on, they chose to step forward with determination, together as one.