I don't own MHA. I do own any ocs that appear. Enjoy. *Hides from pissed off characters*.

Katsuki Bakugo grumbled as he stretched his arms over his head after waking up. A month before he, Denki Kaminari, Izuku Midoriya, Momo Yaoyorozu and one of their teachers; Hizashi Yamada had their genders switched during a villain attack. The teens had decided it wasn't like anything could happen while their genders were swapped, they might as well have some fun with their boyfriends/girlfriends. Though so had Mic and his lover Shota Aizawa which was something the teens didn't know. The week before everyone finally turned back much to their delight.

Bakugo scratched the back of his head as he started to get ready for the day, he didn't know why but he was more tired than normal the last few days. What he didn't know was that he wasn't the only one feeling off. In the other parts of the UA dorms one Denki Kaminari was hunched over the toilet losing his last meal as his boyfriend Hitoshi Shinso rubbing his back. Izuku Midoriya played with his breakfast worrying his own boyfriend and friends. Kyoko Jiro who was Momo's girlfriend frowned since her period was late, but she chalked it up to stress. As the rest of class 2A headed to school, minus Denki who had been bullied into staying in bed, their homeroom teacher glanced at his lover and co-worker who had his glasses pushed up as he rubbed the bridge of his nose.

"Are you alright?" the Erasure hero asked.

Mic looked up at him fixing his glasses, "Just a bad headache."

"If it gets too bad you should go see Recovery Girl or go lay down in the teachers' quarters. I'm sure Eri would be happy to do what she can to help."

Mic couldn't help but grin at the idea, Eri was now legally in their care and a super sweet girl who loved her Daddy and Papa to bits.

"I'm sure I'll be fine," the blonde said as his lover got up and kissed his cheek, "Do your best babe."

"You know I will."

"Are you sure you aren't hungry, Midoriya?" Tenya Ida asked his green haired classmate as he, Shoto Todoroki; Izuku's boyfriend, and Ochako Ururaka looked at him still worried.

"I'm sure guys, please stop crowding my desk."

Bakugo growled at them, they were being noisy, and it was starting to piss him off.

"Take your seats," came a voice the explosive blonde was glad to hear, "Where is Kaminari?"

As the rest of them took their seats Shinso raised his hand, "He was physically ill this morning sir."

"I see…if one of you could share your notes with him once he is well that would be appreciated," Aizawa replied before starting class.

Throughout the day the other teachers noticed that some of their students were acting strange as was one of their own.

Jiro seemed to be dizzy, Izuku stuffed his face at lunch, Bakugo seemed to be having a hard time focusing and appeared downright sleepy, Denki was still out of class, and Mic had gone back to the teachers' quarters.

"That's it," Midnight said tried of wondering what was wrong with her students, "the three of you go see Recovery Girl now."

"She's got a point, you guys are all acting weird," pointed out Mina Ashido.

"We are not!" snapped Jiro startling awake a sleeping Bakugo who had been using his textbook to hide his face.

"I think she has a point," said Izuku getting up, "Let's go."

Bakugo grumbled sleepily as Jiro helped lead him to the nurse's office. Recovery Girl took samples from the trio Bakugo nodding off while they waited.

Izuku sighed rubbing his stomach, "I think I ate too much at lunch…my stomach hurts."

"I'm almost done," called Recovery Girl, "I'll help you with your stomachache in a moment."

Izuku continued rubbing his stomach, trying to stop it from hurting and ignore Bakugo's head on his shoulder.

"Alright I have the results, could one of you wake Bakugo-san?"

Izuku jiggled his shoulder making Bakugo grumble and glare at him.

"Sorry, Kaachan, but you need to be awake for this," the green-haired teen told his childhood friend.

"Stupid Deku."

"Glad to see you're back to normal," commented Jiro earning herself a glare.

"Now I want to confirm something, you all had sex with your significant others while you or in Jiro-san's case her girlfriend was the opposite gender, correct?" asked Recovery Girl before she dropped the bomb, "All of you are pregnant."

After the initial shock wore off the trio realized something, Denki was sick that morning! He might be in the same boat as them. Recovery Girl nodded after being told before calling the other blonde in to test him. Much to their surprise he walked in holding a bag of chocolate chip cookies under one arm; one of said cookies in his hand and in the other hand…a bottle of yellow mustard.

"What on Earth are you eating?!" Bakugo cried in horror.

Jiro gagged and Deku paled slightly as the electricity wielding blonde blinked looking at the elements of his snack.

"I felt really hungry after you all left Hitoshi told me to stay in bed, but I got a craving for something sweet and savory and this is what I could find," he replied with a shrug squirting mustard onto the cookie and taking a bite resulting in Deku clapping his hands over his mouth but he managed to keep his food down.

"Either he's really fried his brain or he's pregnant too," commented Bakugo causing Denki to start to cough in shock.

"Wait?! What?!"

Recovery Girl swatted his back until he stopped coughing and took a blood sample confirming a fourth pregnancy. Nezu took it upon himself to contact the parents/guardians of the parents to be which is where things started to go wrong for one couple.

"Either move my grandson into a private dorm away from that little whore or I will move him to a different school. I will not allow this to ruin my grandson's future! I have too many potential brides line up for him! This homosexual experiment ends now!" yelled Hitoshi Shinso's grandmother and legal guardian slamming her hands onto Nezu's desk.

"Well, ma'am, we were planning on moving the expectant couples into a single level dorm. We could just leave your grandson where he is," the hyper intelligent rodent explained.

"Fine, that will do, now if you'll excuse me, I'm going to have a few words with my grandson," she said before snatching her traditional purse off the desk and marching off.

Nezu sighed, he felt sorry for the child that was having its family ripped apart. Shinso held back tears as he agreed to his grandmother's demands…he was to break up with his boyfriend and then not speak to him at all. He didn't want to but if he didn't his grandmother could make life very hard for Denki's family such as costing his parents their jobs and he couldn't let that happen. At least this way his unborn child could have a home and what they needed.

"I'm sorry but I'm part of an arranged marriage…this thing between us has to end…" he told his boyfriend later that day.

Denki looked horrified, "But…but…"

"This is for the best," Shinso continued before kissing his cheek and walking off leaving the blonde to fall to his knees in shock.

The indigo haired teen broke down himself once he was safely in his own room.

…

Aizawa smiled as he came home to find Mic and Eri working on dinner together, he guessed the blond was feeling better.

"Hey, what are you two making? Smells great," he said starting to take off his gear.

"Hi Daddy!" Eri said running to him, "We were just finishing making curry! I helped a lot!"

"Oh yum!" the dark-haired hero said picking the child up, "My little chef."

Hizashi smiled, his hair was down, meaning he had showered and tied back into a partial bun as he mixed the curry up, "It's almost ready, you two go clean up."

"Kay!"

Aizawa smiled heading to the other rest room to do the same as the child. As they ate, he filled his lover in on what he found out was happening with their students much to Hisashi's shock and Eri's confusion.

"What does pregnant mean?" the child asked.

"That means they're going to have babies, sweetie," explained Hizashi after cleaning his face.

Eri pondered this briefly before continuing, "Where are the babies now?"

"Inside the tummies of their mothers," replied Aizawa as he started to clear the table as the blonde hero got up to serve the ice cream for dessert.

Eri turned around in her seat to watch them, "How did they get in there?"

Both adults froze not sure how to answer that one, eventually the blonde told her they would explain when she was older. After some play time, they went through the little girl's bedtime routine, tucked her in with her favorite green bunny. They did some grading before going to bed themselves. The dark-haired hero was glad to be home, for the last few weeks he's been working a case at the docks so he out in minutes. What he didn't expect was to be woken up by the sounds of someone running and vomiting into the toilet.

"'Zashi?" he asked, still drowsy as he walked into the bathroom to find that the blonde was indeed the one sick, his blond hair in a ponytail resting against his back and luckily out of harm's way.

Yawning, the shorter of the two started to rub his lover's back, "I guess the curry didn't agree with you?"

He was surprised when the blonde looked up at him with tears in his eyes, "T-this isn't the first time I was sick…I was sick early yesterday morning too…I think…I think I might be pregnant too…it would make sense…"

"But we used a condom and those can fail…shit…" the dark-haired man muttered as he realized there was a chance they were having a child too, "You're going to see Recovery Girl in the morning, it's going to be okay. We can do this, now let's get you back to bed."

He helped the blonde to his feet and back into their bed, holding him close but not tightly

TBC