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A soft, loving peck on the cheek wakes him up, but not completely; the omega slowly regains consciousness as someone nuzzles against his neck, burnt caramel scent filling his nostrils.
At first he thinks it's part of a dream, because he's obviously in his nest, he hasn't felt so comfortable in a long time. Izuku finally managed to make the perfect nest. But why does it smell like an alpha? The teacher doesn't have a mate, besides, that scent can only belong to his childhood friend, Katsuki.
That's not possible either, they're not in a relationship, they don't even live in the same building.
The second kiss on his temple wakes him up.
When the omega's eyes start blinking open, Izuku finds himself staring into red eyes.
Hopeful and adoring red eyes.
"Kacchan?" One look around is what it takes for him to realize that he's still inside Katsuki's car. "Is this my-"
The pro hero chuckles, running his fingers through Izuku's soft curls, as he cuts the omega off.
"It's my building. I didn't want to wake you up so I thought it'd be better to take you to my place instead."
The teacher must've dreamed the kisses then, Katsuki didn't want to wake him up, besides, they're not in that kind of relationship.
Izuku nods, because even though he's awake now, he will not make the alpha drive him all the way back to his place; they have had sleepovers before, it's nothing out of the ordinary.
"Okay."
However, his inner omega is not pleased with being pulled away from his nest.
What? That's definitely NOT his nest.
Worry makes him move; he tries to get out, but the alpha is stronger and faster than him. He takes him in his arms with ease, and gets him out of the car and into the building in a few minutes.
"I can walk, Kacchan."
"I am aware."
The alpha makes him dinner, gets him comfortable clothes, with his very distinct scent, making it almost impossible for Izuku to stop his inner omega from misunderstanding the situation.
After dinner, Katsuki shows him the guest room, and the teacher, wanting to be grateful, tries to push his omega's protests away because the room looks cold even though it's the same temperature as the rest of the house.
But then, he gets a glimpse of Katsuki's bedroom, and notices that, on the bed, there are a lot of his clothes, arranged in a way that looks like the perfect nest to Izuku. But alphas don't make-
"I know," the pro hero chuckles. "It's a mess, right? I'm sorry you had to see that, I was looking for a specific shirt and didn't have the time to put everything back in place in the morning. I was in a hurry."
So... it's not a nest, it just looks like one from the omega's perspective. And yet, it's still tempting.
"I'll clean it up-"
"No!" Izuku can stop himself, instinct taking over him in seconds. His inner omega is adamant to sleep in there, despite his rational brain trying to tell him it's not possible. "Sorry, Kacchan! It's just..."
No, he can't tell him. It's ridiculous.
"What is it, Izuku?" The blond smiles, taking both of the teacher's hands in his, smiling gently at him. "You know you can talk to me about anything."
"Can I sleep there just this time?" he blurts out, feeling embarrassed but desperate at the same time. He has no idea what his inner omega finds so alluring about the bed.
For a second, Izuku believes there's a triumphant glimmer in the pro hero's eyes, but that's ridiculous.
And then, the alpha's smile turns into a smirk.
"Of course, but if you want to sleep there and keep the clothes on the bed then you must know I'll be sleeping next to you. It's my room after all."
That seems... fair. However, Izuku believes his omega will definitely get confused by the situation.
"Uhh..."
Before he can make a decision, the alpha takes him in his arms, and gently places him on the bed, right in the middle of the nest.
Izuku can't help but purr and start nuzzling against Katsuki's clothes. He doesn't have the time to be embarrassed because the alpha climbs up next to him before pulling him into his arms.
As hands grab him by the waist and pull him closer, the pro hero lets out an alpha purr that makes Izuku's world change completely.
His omega has chosen an alpha. But Izuku knows Katsuki will never want to be-
"My omega," the alpha purrs again, as he slowly and softly presses kisses all over his face. "MINE."
Izuku purrs in response to the command; he doesn't feel scared though, because his omega is more than happy with the situation.
"You're mine, Izuku."
"I'm yours, Kacchan."
They don't even have to ask, they both know they'll become mates that night.
***
Katsuki wakes up first, because he wants to watch his Izuku sleep for a while; his eyes notice all the bites over the omega's naked body, and the perfect mating bite on the back of his neck.
He grins as he kisses the teachers back, perfectly aware that he used a trick that has been forbidden for so long that not many know about it.
An omega trap.
He doesn't feel bad about it at all, because he knows he'll take care of his Izuku better than anyone else. Katsuki will make sure of it.
However, just to make sure, he'll get his sweet nerd pregnant as soon as possible.