A Painful Past

                                    

                                          
As all the Omegas and Female Betas gather in Auditorium A. The Alphas and Male Betas are in Auditorium B.
In front of the students is corresponding teachers. Mic and Aizawa shock everyone by attending and being in the proper rooms. 
      ~ Auditorium B ~
Since he attacked someone, Nezu is making Shouta wear a collar. He scratches at it as he glares at the murmuring students.
"Sit and shut up," the grumpy male growls. All the students in front of him are holding or wearing their collars. They obey, all of them were raised to be wary of older collared alphas. 
"Now, everyone make sure you have your collar on and its comfy," Toshinori says, smiling, but staying skeletal. The students oblidge, and settle into their seats 
"Now, I trust you all understand why you are here today," Cemtentoss begins, "As this heat draws closer, you will become more aggressive, and driven to mate. However, you are young and this urge is painful. So while you learn to control yourself, you will wear these collars from now till end of season." The mateless alpha speaks with authority.
Everyone begins to murmur as Aizawa growls and steps forward.
"You will be tranquilized if seen without the collar. Tomorrow the heat will begin. Your genitals will grow warm, those with penises will have painful erections. Do you best to avoid masturbating, it will make it worse. For the homosexual lovers in the room, yes that will help. For you betas, if your partner is a female you will be separated." He snarls the last part, "As young Alphas and Betas, you will may want to challenge another alpha for their mate. Don't, you could die." He glares at the crowd as Izuku raises his hand. All but Aizawa is shocked by the determined young alpha.
"Mr. Aizawa, is that why you are collared?" He green haired boy asks, his teacher knows what he is doing and smiles gently.
"Observant young Midoriya," he looks up, a crazed look on his face, "Yes, a stupid young alpha couldn't keep their hands off my mate, or so im told. As a mated alpha, if my omega gets threaten past a certain point, I black out and don't come back till the threat is dead or my mate brings me back." His confession shocked the crowd, and impressed Izuku. He would have to tell his father about it, truly commendable.
"Because the attack was caused by instinct, there is no punishment for either side," Toshinori explains, "But that doesn't mean you can attack others and get away with it. There are signs and evidence to support this being instinct driven."
The crowd nods and murmurs. Aizawa's black eyes are ablaze with warning. Midoriya smirks and nods slightly at his teacher, before slipping back into his hero persona.
Another hand raises nervously. Its Shinsou, he bites his lip and looks to Denki for support. Aizawa activates his quirk and nods for him to speak.
"Does having sex mean your a mated pair?" His soft voice carries with concern. Aizawa deactivates his quirk and rubs his eyes.
"No, there is a special bond and steps to take to become a mated pair. Remember that bond is hard to break, and if you force it on someone...its not pretty," Cemtentoss says, looking at the stiffened Aizawa. He simply glares then, explains what everyone is to pack and where to meet in an hour.
     ~ Auditorium A ~
As the students shuffle in they are shocked to see Present Mic. Some become nervous, others afraid. Small explosions can be heard from Bakugo.
"Don't worry," the smooth voice of Midnight calms the crowd. After they are all seated and comfortable, Mic walks up.
"You may be surprised to see me, but I am actually an Omega," he begins, not needing a microphone, "Now, tomorrow is y'alls first heat. It will hurt, and your bodies will be hot and you'll feel the need to be mated. Don't try and fix it, it will make it worse. If you have a partner,and are together tomorrow yes it will help." His green eyes watch the uncomfortable students.
"Now, nothing except that can help this heat...but afterwords every month you will receive pills to help. And the alphas and male betas will have collars." Midnight says, her eyes glint with anger.
"Why is Mr.Aizawa wearing a collar?" The Katsuki shouts, his voice trembles slightly. Nemuri nearly growls, but sighs softly.
"That is our next point. Once you become a mated pair, your alpha or beta, will become protective of you. Of course you will feel the same way. If someone tries to take away the mate of another. They will black out till the threat is dead or their mate brings them back." Midnight explains, worry 8n her voice.
"Since it was so close to the first heat. Sho lost control. Now, this is not a reason to get into fights. There is evidence and science to back up what happened," Mic continues, placing a hand on Midnight's shoulder.
"If we have sex, do we become mated pair?" Momo asks, her confidence is betrayed by the nerves in her voice.
"No, deary. There is a process to becoming a mated pair. Now, both sides can force the other." Recovery Girl says, a rare mateless omega, "The separation process, of either consenting or forced, mated pairs is painful and is not pleasant." The old woman glances at the angry Mic, she nods knowingly. The students are too busy murmuring to notice.
"Bring your toiletries, bedding, and comfortable baggy clothes to the main gymnasium in a hour and a half," Midnight says, dismissing the crowd. 
The teachers go to their homes or dorms to prepare for the next few days.