Chapter Text
Bakugou and Deku were happily dating, having mentioned all sorts of ideas for their future. One of those ideas being that they eventually wanted kids. Soon enough, their relationship became a poly triad with Todoroki involved.
All of them were absolutely ecstatic about the way it evolved. They were all switches and had so much in common that it lead to some amazing memories. They had a very strong bond.
See, Bakugou was an alpha and Todoroki and Deku were omegas. But they still enjoyed taking turns being on top and such.
One day after they had all been together for a while, they decided it was time for both omegas to try to become pregnant with their alpha's pups. And thus, Bakugou fucked them both through their synced up heats, making sure to fill them both up plenty and breed them good.
A few weeks later, Todoroki had noticed that his heat was a couple days late. Bakugou bought some tests and within a few minutes they found two strong lines on the test, revealing that the omega was definitely pregnant.
Deku was very excited, and didn't want to ruin the news with the negative test in his hands that he had taken due to Bakugou's request. Bakugou had assumed he would be pregnant too. But Deku threw it away and just focused on celebrating Todoroki's pup. He loved him afterall, he was going to be there for both of them.
Deku's heat soon came again, it felt a bit more painful both emotionally and physically than his usual ones, but he brushed it off. Bakugou and even Todoroki helped care for him during it, the alpha of course breeding him even more this time. There was no way it wouldn't catch this time.
Except it didn't, nor did it the next few heats either. No matter what they tried, eating differently, different positions, staying knotted longer, breeding more, it never worked. By now Todoroki was seven months along, the baby would be due in two more heats time.
Bakugou last resort suggested to Deku that maybe he should see a doctor, maybe it was just something small that could be fixed. Deku agreed, but deep down he barely had any hope left.
The doctor took blood among other samples from his body in order to test his fertility. He then sent Deku back home to his mates with the note that he would call within two weeks with results.
Todoroki had started to stay home from work, resting with the baby. Bakugou and Deku were still working, but Deku worked much less. He was at work when he recieved the call back from the doctor with his results.
"Midoriya, I regret to inform you that all of your levels are extremely low, your body does not have enough eggs to create a pup. You are infertile." The doctor explained softly. Once the call was over Deku curled up for a moment to let the sting of heartbreak crash over him like waves. He was about to go on his heat vacation after today and just got /that/ news. This was a dream he had for as long as he could remember, and it was just gone.
By the time he got off work, Bakugou knew both of his mates would be at home. But when he walked into the living room all he seen was dinner on the dining table and Todoroki on the couch waiting for him. "Where is Deku?" He asked curiously, confused as they usually both wait for him.
"He came home, made dinner and then went straight to the nest. I tried to ask him what was going on but he wouldn't answer." Todoroki explained. Bakugou nodded. "Well I don't want to waste the food, so let's eat and then we will check on him."
Meanwhile, Deku was buried in a frantically built nest sobbing silently. His entire body shaking. Once his mates joined him he eventually was able to get the words out, before breaking down again. He spent this heat mostly emotional like this.
Todoroki was now in his eigth month of pregnancy and Bakugou was staying home a bit more to help care for him. Deku helped as well as much as he could. Help wasn't the problem though, he was slowly noticing his mates drift off and away from him.
He understood sharing a pup created an even bigger bond between the two, but at the same time he noticed less and less focus on him. On the infertile omega. He didn't have the guts to speak up about it. So he just watched from the sidelines.
Watched as the pup was born, as they slowly paid even less attention to him. Watched as he was no longer involved in date nights. Watched as the days of not being noticed that he wasn't waiting for their alpha to come home got more and more frequent.
Eventually, he felt like he was no longer wanted, after all, in his mind he felt broken. So he packed his bags and just left the house one day while Bakugou was at work and Todoroki was at an appointment. And he still wonders to this day, if they ever even noticed his absence.