As the last of the black goop vanished and Class 1-A reformed, they found themselves inside Denki's mind. The sight that greeted them was nothing short of bizarre.

"So, this is Kaminari's mind? It's... colorful," Momo Yaoyorozu said, looking around at the vibrant mindscape.

A sudden movement caught their attention. There, in the distance, was Denki Kaminari, opening a door.

Behind the door was a large black goopy whale-rabbit-thing, glaring at them with white eyes. Par, the parasite.

Upon seeing Par, Denki's own eyes turned white. He was under the parasite's control.

Par and Denki began to speak, reciting a strange, cryptic incantation together. The words echoed through Kaminari's mind, resonating with dark energy.

"We have to do something!" Izuku Midoriya exclaimed, his eyes wide with alarm. "We can't just stand here and watch!"

Katsuki Bakugou's brows furrowed, "Yeah, we have to snap him out of it." His hands sparked, ready for a fight.

Eijiro Kirishima nodded, "Right, let's save our friend." He hardened his fists, preparing for the inevitable battle.

Mina Ashido and Ochaco Uraraka shared a determined look before joining their classmates in the charge towards Denki and the parasite.

They confronted the parasite, their resolve stronger than ever. Par, however, was not fazed. It continued to control Denki, unfazed by their presence.

The fight was challenging, with the parasite using Denki's powers against them. Every attack was blocked, every move countered.

Fumikage Tokoyami and Dark Shadow contributed their strength, while Mezo Shoji used his duplicate arms to shield his comrades.

Despite the odds, they persisted. They knew they had to save Denki. They had to free him from the parasite's control.

Finally, Izuku discovered a pattern in the incantation and shouted it out, giving their attacks a chance to break through the parasite's defenses.

Capitalizing on the opening, Shoto Todoroki sent a simultaneous blast of fire and ice at Par, disorienting it.

Katsuki followed up with a powerful explosion, causing the parasite to shriek in pain, its control over Denki wavering.

As the whale-rabbit-thing reeled back, Tenya Iida, Rikido Sato, and Mashirao Ojiro seized the opportunity to launch a joint attack.

The combined might of their onslaught finally managed to loosen Par's grip on Denki. His eyes began to return to their normal color, the white fading away.

With another powerful attack from Todoroki, the parasite was at last expelled from Denki's mind. The Class 1-A breathed a collective sigh of relief.

"D-Denki?" Ochaco Uraraka stuttered out, her heartbeat echoing in her ears. Denki's eyes were their regular, warm golden hue again.

Waking up, Denki looked around at his classmates, everyone showed a look of concern and relief. "Huh? What happened?"

They explained everything, from the teleportation to the fight against the parasite. Denki was utterly shocked, "I don't remember any of it!"

After an emotional reunion, they soon found themselves back in reality. Denki, saved and back to his old self, surrounded by his relieved friends.

Although they still had questions, the relief of having Denki safe outweighed them. The events felt surreal, like a dream or a distant memory.

Yet, the bonds they shared were as real as the gratitude they felt for each other. They were not just classmates but a family. One that would always stand together.

Their friendship, their unity, was their greatest strength. They had been tested in the strange world of Denki's mind and emerged victorious.

Class 1-A returned to their daily life with a renewed sense of camaraderie. Yet, they would always remember the strange adventure in Denki's mind.

And as for Denki, he learned a valuable lesson about the strength of friendship and the power of unity. He was grateful to have such friends.

In the end, they all knew one thing for sure - they were stronger together. And nothing, not even a mind-controlling parasite, could break that bond.