The Greatest Promise (BakuDeku)

Chapter 13: Fated Mate

*smut*

"Ok, Kacchan. I'll be your Omega," as Izuku spoke, his body's temperature began to rise rapidly. This was it, the deadly heat was here. Would a bite from his fated Alpha be enough to save him?

Katsuki's lips were on him immediately. There was nothing tender and sweet about this kiss, it was passionate and lust driven. Hands were tangled in hair as they pushed against one another. A moan escaped the Omega as he revelled in the moment the two were sharing. Part of him couldn't believe this was all happening, and in a hospital too!

That's when Izuku smelt it, somewhere in his pre-heat driven mind he could sense that the Alpha was about to go into a rut. This was going to be intense for both of them. He'd never been with a rutting Alpha before.

Izuku was still in his hospital bed, wearing a hospital gown. He didn't want it to happen like this, "Kacchan, I need a nest," the Omega wined. He wanted to be home, in his rest for this.

"Don't worry, Omega," the Alpha gently kissed Izuku's forehead, "I know it isn't your nest but we have a special bed that should suffice for now. As soon as I can, I'll get you home and to your nest." Katsuki picked up the Omega like he weighed nothing, holding him close to his firm chest. Izuku could smell the reassuring pheromones coming from the blond as they moved across the room. He knew that he'd feel embarrassed if he wasn't about to be mated to the Alpha, his fated Alpha. He also knew that the embarrassment would be very present once this was all over. Yet, Izuku felt comfortable, like everything was finally falling into place. This was where he was supposed to be.

The Omega was dropped, gently, onto a larger bed. They must have brought this in when Izuku was still unconscious. It had a chemical smell to it that needed fixing immediately. He gestured to the Alpha, demanding his clothes be removed and handed over. Katsuki didn't need any further instruction. He pulled his jumper off to begin with, followed by the t-shirt he was wearing underneath. Izuku took the Alpha's clothes and began to make a 'nest'. He knew that two items of clothing wouldn't be enough. He needed more to mix in with the sheets, blankets and pillows. He looked back over at Katsuki, who was still wearing trousers. He raised an eyebrow and pointed. "I need more, Kacchan. It doesn't smell right."

A deep chuckle came from the Alpha as he began to remove the rest of his attire, "such a needy Omega."

Once he was a little more satisfied and the clothes were in the correct position, Izuku then began to take his own clothes off, with the Alphas help of course. He had to make it as good as he possibly could with the limited items that he had.

"More," the Omega wined, "we don't have enough." This wasn't right and he didn't know how to fix it.

"Hang on, Omega," Katsuki said as he stepped away from the king sized bed, causing Izuku to let out a whimper at the separation. Izuku watched as he strode to the window where there was a bag. The Alpha pulled the contents on the bag out and returned to the Omega.

Izuku looked at what was in the Alpha's hands and smiled. It was the clothes that he'd been wearing before he'd been emitted to hospital. Eagerly, he began arranging them in his temporary nest. It wasn't going to be perfect, but it would have to work for now.

Once he felt satisfied, he moved his attention to the Alpha that was waiting to be allowed to enter the nest. Katsuki looked pained, his fists were clenched and Izuku could hear him breathing heavily. He was almost in full rut. He'd never been with a rutting Alpha before, he'd read about them though. He imagined that this might be Katsuki's first time with an Omega in heat, they are usually saved for mates. This was going to be intense for both of them.

"Alpha," Katsuki's crimson eyes locked with his, "you may enter."

That was all the Alpha needed. He was straddling the Omega and panting heavily. Izuku let his inner Omega take over, he had to be submission for his Alpha in rut.

He felt Katsuki move closer, his breath tickling his delicate neck. That would be where he would be claimed soon. He bared his neck in submission, causing Katsuki to growl possessively.

"Good Omega, you're going to look so good with my mark on you."

Izuku felt the slick between his legs increase. He hadn't been paying much attention to it until now, but it was now running down his legs. He knew that the Alpha must have smelt it. Katsuki made his way down the Omega's body, peppering kisses as he went until he was between Izuku's legs. He gently pushed them open, running a finger up the Omega's cock.

Izuku was putty in the Alpha's hands. Moans and mewls were all that could be heard as Katsuki lowered his head and began to taste the sweet slick that had been driving him crazy. It tasted just as delicious as he'd hoped. He couldn't get enough of it. Katsuki could sense that the Omega was close, he was holding his rut back as much as possible. He didn't want this time together to be a blurry mess to him. Once he's claimed his Omega, he'd succumb.

He knew that he didn't have long.

He carried on, enjoying the sweet taste of green apples until he felt Izuku begin to tremble. He began to lightly trace a finger along the Omega's cock that was now wet with pre-cum. That pushed Izuku over the edge, blissful sounds erupted from his mouth as white fluid erupted into his stomach.

Katsuki sat up and looked at the heat dazed Omega, "Izuku, I don't want to rush this. But, I'm going to have to, my rut is so close and I don't want to hurt you. I need to prep you," the Alpha was doing his best to stay in control. Time was running out.

"Alpha please, I need you. Knot me. Fill me. Breed me."

The pleading cries of the Omega were music to his ears, "as you wish, Omega."

With that, Katsuki slid two fingers straight into his hole. The Omega was so wet, there was little resistance. The continued pants and moans encouraged him to add another and then another. He was a large Alpha, he needed to prep him properly.

"Now Alpha, please. I need you now!"

To be honest, Katsuki couldn't wait any longer either. He removed his fingers, and flipped Izuku onto his stomach, "present for your Alpha."

The Omega needed no further encouragement, his bottom thrust high in the air. Katsuki had never seen a better sight. He pushed himself in, waiting a moment for Izuku to adjust. He didn't have to wait long, the Omega was trying to move for him. Katsuki held the smaller's hips and began thrusting into the green haired male.

The two fit together perfectly, Izuku felt so tight around him. He carried on until he could feel his knot beginning to swell.

"Are you ready for my bite?" Erratic and over enthusiastic nodding was all he received in reply. "I need to hear you say it, Omega," Katsuki was getting closer.

"Please, Alpha. I need it. Katsuki, I need your mark." That was all it took for the Alpha to lock them together and fill him. As they were both coming down from their orgasms, the Alpha gently kissed the spot he was about to mark.

Izuku's breathing was still laboured, but he wanted more. Needed more. The Omega bared his neck in preparation.

The blond smiled before biting his fated mate.