After the first quirk appeared changes rapidly started appearing, children were already going through strange changes with different designations, and scents appearing. However after a few years development stages appeared at different times.

Children were assigned their quirks between the ages of four to eight, gender and second genders appeared at birth, but scents didn't appear until they were about fourteen to sixteen.

Sometimes students felt embarrassed, they would be going about their lives normally. Puberty was happening, but most people kept that to themselves, then bam a waft of whatever smell they would be stuck with forever.

The class of 1A was sitting in for a normal lesson, a few students were starting to get their own scents. Iida, an alpha, smelt like orange juice and motor oil, No one was surprised when Mineta, a beta, smelt of grape juice.

Denki, an alpha, smelt of burnt copper.

Many of the students were still waiting for their scent to show up, it wasn't until Aizawa gave them a free study day. Which most students were actually untrusting of, when Sato lifted his head up. "Is someone baking in the kitchen?" He was salivating. The other students started to try and smell exactly what he was smelling.

There was a class wide sigh of want. "Mhmmm… That smells so good." Yaoyorozu mumbled, the female alpha closed her eyes with a grin.

Todoroki narrowed his eyes, and then he realized he was the one who smelt like the dessert they all were smelling.
"No…" He managed out under his breath.

"What's wrong icy hot?" Bakugo asked as he turned towards his fellow classmate.

"It's me."

"What's you?" Bakugo asked, clearly confused.

Mineta, while usually a creep for just the girls regardless of their secondary genders, also had a thing for the class omegas. "Oh it's you that smells so sweet, aren't you se- agh.." Mineta yelped as ice grasped his arms and stuck him to the floor.

"Shoto," Aizawa snarled. "We don't use our powers on our classmates outside of training, even if they are… Gross."

"Hey…" Mineta whined.

"Oh.. Shoto…" Aiwaza saw the look on the omega's face.

"Ca-Can I go to the bathroom?" He asked with a clear look of panic on his face.

"Go ahead." Usually his teacher wanted to seem like a hard ass, but he had a soft spot for all of his students.

Todoroki moved quickly, pushing past Kirishima and nearly tripping over his own feet. Uraraka looked up at Aizawa who nodded back at her. She raced to follow Todoroki who was breathing heavily. He hardly made it into the bathroom before he dropped to his knees and began to sob. Uraraka wrapped her arms around him. "Todoroki…."

"I'm okay… I- I ju-." He took a few deep breaths as she held onto him. "I.. I just… Ever since I was little my father has mistreated me… For being an omega.. For being opposite what he had wanted.. I just think this will.. This will make it worse.. I smell like a fucking…. Like a bakery…"

"You smell really good, if you're worried about that… I wish I could help you."

"I'm okay.. I just need to take a breath… I need to be okay. Mineta doesn't help you know. It's an enticing scent…"

"It is, yes." Uraraka muttered softly. She sat beside him for a moment, before they both heard footsteps. The bathroom door opened and then someone sat beside them.

"Mine too.." Bakugo whispered as he grabbed one of Todoroki's hands. Uraraka smelt the air, before Bakugo entered the room it smelt like vanilla ice cream and a warm chocolate lava cake. Now that she was scenting her omega classmates she could smell a mix of sweet and spicy.

"Mango Salsa?"

"Yep.." Bakugo leaned into Todoroki, the two of them would go back and forth between being best friends and rivals. Being the only omegas in the hero course meant they needed someone to rely on for all the omega parts of life that no one else would be able to help them with. Uraraka sighed watching her classmates rely on one another in such a way, and she was honestly happy that she could be a support for them. Being a beta meant that she had a desire to support them just based off designation, but they were her friends even when they tried to hide that part of themselves.

They were some of the strongest kids in their class, if not the world, but they were relying on her too.

She wrapped her arms around them, her own scent had appeared a few days before and it was calming, she smelt like bubble gum scented bubbles. "You know its not bad to have a sweet scent."

"I'm too strong for this." Bakugo groaned. Todoroki looked between him and then Uraraka.

"I think between the two of us, with our ability we want to be seen as something stronger and with such a sweet scent we may be underestimated."
"Yeah, what icy hot said."

Uraraka smirked. "You're right, but sometimes being underestimated can give you an upper hand. If someone looks at you and thinks you're weak because of your second gender or scent. That will give you the upper hand. You'll be able to kick their ass and surprise them."
Bakugo and Todoroki grinned. "You're right."

"Good, now come on. Let's go show our class that our strong fire boys with some added ice, may have some good smelling scents, but they're still the strong boys we know."

The two boys got up off the ground, and they walked back together into their classroom. Their scents mix together in a wonderful way. It was a good mix of sweet and spicy. The mango, ice cream and chocolate filled the room up, and the salsa scent helped it simmer.

As soon as they walked into the room, the rest of the class cheered for their omega classmates. "Sorry…" Mineta whispered from his spot, his shoes still frozen to the floor.

"You've both got your scents now!" Sato said with a grin, his own scent smelt like a fresh baked croissant, which also hadn't surprised most of them.
"Congrats to both of you," Aizawa said with a grin. "You both are progressing well."

The omegas looked over one another, and then smirked a bit. "Shoulda got mine first." Bakugo whined.

Todorki laughed. "You were just pissed."

"Yeah.. Well…." Bakugo blushed a bit. "Still should have gotten mine first."

The class laughed, but they were glad to see their classmates growing more comfortable with them. Being underestimated wasn't a problem they would face from one another. It was clear that they would support each other through thick and thin. They all knew how strong each of their classmates truly were.

Another two weeks past and Midoriya got his scent, it was a mix of pine and pine nuts. Close to All Mights with the scent of banana bread with nuts in it. He was just glad to be a part of it all. He hadn't gotten a quirk at the normal time, and when he did get One for All, he jumped from beta to alpha and had to claim to everyone that he had been on blockers. Explaining to his mother had been harder but she just assumed he was a late bloomer and something had gone wrong.

"At least I got my scent before you, Deku." Bakugo smiled, feeling pride in the scent that already annoyed him.

Deku only smiled, giving him that win was helping him with his confidence.

Shoto had gotten an earful about how his scent made him weak, but he knew that it made him stronger and if his father hated it, it made him like it just a little bit more.