Things get dangerous soon.

Aizawa grumbled after receiving a message, and informed the class, "All Might was supposed to join us today, but he was... Held up," he stated. "He'll be joining us near the end, but we'll have to proceed without him."

Izuku winced, able to piece together what happened. He must have done so much Hero work on the way to school that he was at least near his time limit. They then looked up to see another member of faculty approaching, what looked like a somewhat portly astronaut.

Ochaco immediately gasped. "It's Thirteen!" she cheered.

"Oh yeah, that's right, she's your favorite Hero, isn't she?" Izuku asked, getting a surprised look from Ochaco.

"Wait, you actually remembered that? It was just a small detail I told you weeks ago!" she asked.

"Of course I remembered!" Izuku responded, almost offended that she'd think he'd forget. "It's an important detail about you!"

She grinned and immediately hugged and kissed him. Mineta whined. "It's just not fair! How come he gets two beautiful girlfriends to himself!? What's he got that I don't!?"

"...do you really want an answer to that question?" Mina questioned Mineta.

Before he could respond, Jiro decided to provide an answer. "About three feet on you, muscles, otherwise decent looks, an actually respectful attitude, and most importantly, two girlfriends," she snarked. "And a sex genie," she mentally added.

"Ooooh, roasted!" Tokage laughed as Mineta raged at the "injustice" of it all.

"Is that really necessary?" Kendo asked Jiro.

"His main reason for wanting to become a Hero is to get women to let him touch their bodies, that came straight from his mouth on day one," Mina said flatly.

This immediately got glares directed at Mineta from the 1-B girls. "Not surprising that Class 1-A has such a degenerate among their ranks," Monoma smirked.

"Please don't associate the rest of us with him," Kirishima grunted.

Meanwhile, 13 began explaining that they would be doing Rescue Training over the various zones of the USJ, designed to simulate natural disasters. She herself explained how she used her Black Hole Quirk to clear debris, and also gave the class a stern lecture about how frustratingly easy her Quirk and several others could be used to kill, just as they could be used to help others.

Before they could get started however, a large, black misty spot appeared in the air a good distance from the two classes. "What the?" Iida asked, narrowing his eyes, on edge.

"Is this part of the lesson?" Kaibara questioned nervously. Vlad and Aizawa narrowed their eyes, the latter reaching for his capture scarves.

"No... It isn't," Aizawa responded, his eyes narrowed as people started coming out of the black cloud.

(Hoh boy, not looking forward to writing all this out... I don't do the best with large battle scenes. One on one fights, I'm a bit more confident about, but large scale battles? Yeah, please go easy on me guys, lol.)