Their Freckled Omega (KiriKamiDeku)

General Info

Mate marks and rankings:
Everyone is born with a certain flower that usually represents their personality. The color of their mark really doesn't mean anything. An omega mark is on their wrist, betas are on the shoulder, NOT THE SHOULDER BLADE! Alpha marks are on the chest/collar bone.

Once someone hits puberty, they get a secondary mark. This is their mate's mark, the one their mate was born with. It will be in the exact same place as where it is on their mate's body.

Someone having more than one mark is extremely rare but not completely unheard of. It's also extremely rare for an alpha to be mates to another alpha, especially is there isn't also an omega in the relationship. Omega and omega relationships, don't exist.

Betas are the most common of the 'secondary genders'. They make up about 70% of the population. Alphas are at about 20%, and omegas cover the remaining 10%.

Omegas can get pregnant, no matter the gender, but only by alphas. Which means a male beta can not get a male omega pregnant. A female alpha can get a female omega pregnant, but I don't really want to talk about it. It's not relevant to this story anyways. And obviously a male alpha can get a male omega pregnant. Male alphas and betas cannot get pregnant.

Heats:

There really isn't anything fancy about the heats in this universe compared to other omegaverses. Obviously, heats are only experienced by omegas, both male and female. Heats occur once a month and last for 3-4 days. During these 3-4 days, the omega will feel extremely feverish and sexually frustrated. If they're mated, then they only want their mates, if not, they can tolerate being with a different alpha. Any touch from an alpha will ease the heat, ex. Holding hands, snuggling, kissing, not just being sexually. Many omegas get help from alphas that they trust, when they don't have a mate yet.

Nesting:
Omegas nest right before they go into heat, or when they're extremely stressed or anxious. Basically, they just get a lot of pillows, blankets, and clothes and make a comfortable makeshift bed. Usually they'll get a lot of things with their mate's scent on it. They'll also want the scents of close and trusted friends. They just want a lot of calming comforting scents around them, which does tend to include friends, not just mates.

Class Rankings:

Alphas:
Kirishima
Kaminari
Bakugou
Todoroki
Yaoyorozu
Iida
Shouji
Tokoyami

Betas:
Uraraka
Mineta
Hagakure
Aoyama
Koda
Asui
Sero
Mina
Jirou
Sato
Ojiro

Omegas:
Midoriya

Omegas are generally, not necessarily looked down on, but more like babied. People don't hate omegas, they're usually pretty valued in society, but people are usually walking on glass around them and act like they're extremely fragile. There aren't any openly omega pros. Midnight will be an omega, but she says she's a beta for safety reasons.

Other Info:
I just want to make sure everyone knows what happens before this story starts. Izuku was still born quirkless and still receives One For All from All Might.

Bakugou DOESNT BULLY IZUKU! The magic of AUs, I can do whatever I want. Basically when Bakugou finds out that Midoriya is quirkless and an omega, he chooses to still be his friend, and he also becomes like a protector of sorts. Honestly, he turns into a big scary older brother. 

Also Bakugou has been helping Midoriya through heats almost their entire lives. Like I've stated before, it doesn't have to be sexual to help, it's literally any affection touch from an alpha. All they do is snuggle and play video games for a couple days. 

Last thing before you start reading. They get dorm assignments right away, at the same time they get their acceptance letters. So all of them are already moved in.