Class 1-A was in the middle of their usual training. Their teacher, Shota Aizawa, watched over them, his gaze stern and observant.

The students were scattered around the training field, focusing on their respective quirks. Denki Kaminari was practicing his electric powers, his concentration palpable.

Suddenly, a large boulder rolled into the training area. It seemed to pulsate with a strange energy, causing the students to stop and stare.

Izuku Midoriya, the class's diligent note-taker, observed the boulder intently, his eyes wide with curiosity.

Suddenly, the boulder began to move towards Kaminari. He stood frozen, his eyes wide with surprise.

Before anyone could react, the boulder collided with Kaminari, sending him flying. His classmates gasped in shock.

Tenya Iida, the class representative, immediately took charge, ordering everyone to stay calm and clear the area.

Momo Yaoyorozu quickly created a stretcher with her quirk, rushing over to help Kaminari.

While the others were helping Kaminari, Midoriya approached the boulder, studying it closely.

He noticed a faint glow on the boulder whenever Kaminari was nearby, hinting at its possible affinity for electricity.

Meanwhile, Kaminari was being tended to by Recovery Girl. He grimaced as he tried to sit up.

Iida and Midoriya informed Aizawa about the boulder's strange behavior, their faces grave.

The teacher frowned, his eyes narrowing as he turned to look at the boulder.

Meanwhile, Kaminari had recovered enough to join the others. He stared at the boulder, his face pale.

Aizawa decided to move the training to another area, leaving the boulder alone. He instructed everyone to avoid it.

However, Kaminari was still upset. He felt responsible for the disruption and wanted to make it right.

With Midoriya's help, he developed a plan to neutralize the boulder's energy, using his own electricity.

He approached the boulder, his hands sparking with energy. He took a deep breath and touched the boulder.

There was a bright flash of light. When it faded, the boulder was still. Its strange energy had disappeared.

Kaminari collapsed, exhausted but triumphant. His classmates cheered, relieved that the danger was over.

Aizawa watched the scene, a rare smile tugging at his lips. He was proud of his students, especially Kaminari.

The rest of the training went smoothly. The students learned a valuable lesson about adapting to unexpected situations.

Kaminari, despite his exhaustion, couldn't stop grinning. He felt like a true hero.

After the training, the students returned to their dorms. The boulder was left alone, its energy neutralized by Kaminari.

Class 1-A had faced an unexpected obstacle, but they had overcome it together. It was just another day in their journey to become heroes.