Chapter Text
You felt something nudge against your entrance and you wanted to push back against it, but Katsuki’s hand was on your back to keep you in place. You felt him rub the head in your slick and he was about to push in. You whimpered.
“What the hell is going on in here?”
The three of you looked up to find Aizawa gazing down at your position on the floor. The man’s dark grey eyes narrowed and he sniffed at the air, shook his head, and laughed. “I see. And this is how you idiots react.”
He walked past Deku on the floor and wrapped his hand in your hair, pulling you up by a fist of it. “Is this really what you want? You finally f*cking present and you choose to get railed by two f*cking teenagers?”
You whined at the treatment both because it hurt and because it was somehow exactly what you needed. You knelt with your shorts and panties around your thighs and otherwise naked. Your hands reached out to him and he batted them away.
“Don’t touch me.” His voice was cool. “I should drag you up to your room and barricade you in there until this is over.”
The thought of being alone, enduring this without anyone else around you, was terrifying. “No, no, please,” you plead. You reached for him again and this time he allowed you to cling to his trousers. “Please, sir.”
Aizawa looked down at your flushed skin, your blown-wide pupils, nipples pert, and felt himself harden. You were a sight to tempt him.
Aizawa was a somewhat good man but he could admit to certain weaknesses. Needy omegas on their knees begging for him? One of those weaknesses. It made him want to grab you by the throat and f*ck you senseless.
What he should have done was taken you to a secure location to ride it out so that you could coherently decide the protocol from here on. But his instincts were begging him to put the little assholes who were about to take you in their place and do it himself.
“So? So would you rather I leave you here with them?”
You shook your head. You didn’t want him to leave. You felt so safe with him, trusted him. You nuzzled against his leg to show him how much you wanted him to stay.
Aizawa hummed. “In that case I’m gonna f*ck you.”
“Hey—”
“Mr. Aizawa!”
The older man held up a hand and silenced the two boys. He eased you up to stand and had you shuck the clothes hanging from your body, then he took stock.
How had he not noticed your body was changing over the last few months? Now that he knew what was happening he could see it, see the way your hips had spread and your body thickened. He palmed one of your breasts and you trembled, overly sensitive in your skin. Aizawa chuckled at the reaction.
You were such a good girl. He’d often thought of how you’d be the perfect omega, always eager to obey his commands, fiery when sticking up for classmates, and resilient in battle. Besides, you smelled wonderful and you were do damnably cute.
He could mark you, claim you as his, bring you back home for his partner to mark too. If they kept you safe long enough no one else would be able to claim you, not even by the lesser scent glands. You’d be theirs; theirs to love, theirs to breed, theirs to do whatever the f*ck they wanted to. However, he had no idea how you would react once you had come out of your heat and he would prefer to bond an omega who wanted him all the time, whom he didn’t have to constantly force.
At the same time, he knew he had to warn the rest of the class against doing that very thing. Who knew what would have happened if he hadn’t interfered. Bakugou and Midoriya both could have claimed you.
A thought came to him. He lifted you into a bridal carry and you clung to his shirt and nuzzled at his throat with little kitten licks. The boys protested when he entered the common area, but Shouta had decided something. He was going to announce it to the class.
A good half the students looked up upon your entrance, pupils immediately blown and mouths watering at your enhanced scent. It didn’t matter that they could smell three other alphas had touched you. You were unclaimed and in heat. “Looks like our little Mouse is an omega after all.” Aizawa stroked your thigh and you whimpered, opening your legs a little.
“She will be welcome to stay in our class as long as our learning isn’t disrupted and no one is to claim her without permission.” He shooed Kirishima and Mineta from the couch and dropped you on it. You squeaked and gripped the cushions behind you, then he crouched over you, black hair obscuring half his face and looking for all the world like a predator about to swallow you whole. “However,” he continued. “I think it’s only fair that, since our Mouse has benefited from our care without any repercussions, she learns how to take care of others too.” The class held its collective breath as everyone waited for him to explain. “Those with certain… instincts…” He nodded to Kirishima who, while not an alpha, behaved more like one anyway. “You can use this pretty thing to ease them as long as you remember the rules.
“Like I said: it does not disrupt the learning environment or studies. You do not claim her. Lastly, no one outside this class is to know. Understood?”
Shinsou stood in the doorway, purple eyes locked on your nude body. He entered in time to hear Aizawa’s speech and nothing more. “Welcome to Class A, I guess,” he muttered.
“Get in and shut the damn door,” said Aizawa. “Good timing, because I’m not explaining this sh*t again. Now you can all take a seat or go to your room, but I’m f*cking her first.”
