for those of you who don't know, this story is also on Archive of Our Own. I'm posting it simultaneously in both places.

* i copied from wikipideia... please don't hate me

anyway please review! (tell me what you like, don't like, needs improving... help me become a better writer)

~inudigifan201

*this story's depiction of sex might not be accurate. it's hard writing a subject i know nothing about. but, hopefully it's not too bad.*

Ch, 11. Angler fish

Katsuki flipped channels on the tv in his room. Izuku was sound asleep beside him. He landed on a nature documentary when the sight of an angler fish caught his eye.

"Some anglerfish are notable for extreme sexual dimorphism and sexual symbiosis of the small male with the much larger female, seen in the suborder Ceratiidae, the deep sea anglerfish. In these species, males may be several orders of magnitude smaller than females"* The narrator talked as the creepy fish swam on the screen.

Katsuki tilted his head and pulled out his phone.

"Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs. The condition occurs in most animals and some plants. Differences may include secondary sex characteristics, size, weight, color, markings, and may also include behavioral and cognitive differences. These differences may be subtle or exaggerated, and may be subjected to sexual selection and natural selection. The opposite of dimorphism is monomorphism, which is when both biological sexes are phenotypically indistinguishable from each other."* The Wikipedia article was very informative.

"Hey nerd." He shook Izuku awake.

With a grumble Izuku opened his eyes.

Katsuki pointed to the tv. "We're angler fish." He chuckled.

Izuku blinked at him and then closed his eyes again. "That's great Kacchan."

Katsuki pouted as he looked his mate over. "Hey nerd." He nudged him a little. "Where were you this morning?"

"Hum?" Izuku sat up with a yawn.

Katsuki was now full on frowning. "I woke up at the ass crack of dawn and you were MIA until the alarm went off."

Izuku rubbed his eyes. "Joined a gym while you were in the hospital."

"What? Why?" Katsuki tilted his head and furrowed his eyebrows trying to understand his mate. He then scowled. "You trying to be an actual alpha?"

Izuku was confused. "I am an alpha though."

"Lose one pup and suddenly I'm not good enough for your high standards." Katsuki crossed his arms.

"What?" Izuku was even more confused. "No!"

Katsuki didn't listen. "Or was my heat shitty because you haven't really touched me in weeks?"

"No." Izuku tried to defend himself.

"So who is he? The guy you're bulking up for?" Katsuki fumed.

"You? Myself?" Izuku gripped the blanket. "I'm not cheating on you."

"Oh please, you think I'm an idoit?" Katsuki's eye twitched. "You get me and you think you can have anyone else."

Izuku sighed and crawled out of the bed over to his school pants he took off a few hours before hand and grabbed his wallet out of the back pocket.

VVVVVV

Izuku knew actually joining a gym was a good idea, even if he hadn't gone yet. He pulled the membership card out of his wallet and presented it to Kacchan.

Kacchan snatched it out of his hand and studied it as Izuku sat back down on the bed.

"Kacchan…" He spoke calmly. "I want to get stronger for you." He raised his arm and ruffled the blond's hair. "I couldn't do anything when that monster attacked you and I felt so helpless and a horrible mate. Honestly, I thank my lucky stars that I'm with you in the first place. I was worried outside of your heat you wouldn't want me, so I try very hard to treat you as an equal thinking maybe if sex is bad then we can still be friends. That you'd want to keep me around regardless." He lowered his hand, but gestured to himself. "Look at me. I pass for what people think an omega is supposed to look and act like. You really think somebody else would want me? Hell I'm surprised, in a good way, that you even wanted me in the first place considering how I'm quirkless and you bullied me for that."

Kacchan rolled his eyes, but handed the card back. "You forgot that you're also a huge nerd."

"I'm not a traditional alpha. The only alpha thing about me is… well I honestly don't know." Izuku continued, ignoring his mate's comment.

"You have a knot, that's an alpha thing." Kacchan leaned on the head board of the bed. "You know they make dildos and vibraters with knots." He pulled his phone out of his sweats and quickly found what he was looking for to show his mate the website that made such things.

"No, I didn't." Izuku blushed wildly.

"Half tempted on ordering one since somebody isn't touching me." Kacchan gave him a wicked smile.

"What if I'm bad?" Izuku looked down at the sheets.

"You're not." Kacchan scrolled on his phone. "I was lucid the entire heat. I said what I meant and I meant what I said. Besides, you analyze every fucking thing and I swear you took notes on the best ways to please me."

Izuku scratched the back of his neck. "I did." He didn't have to call him out like that.

"Point made." He rolled his eyes.

Izuku took a deep breath. "Kacchan."

He looked over to him.

"I love you. I've loved you for my entire life. I can't imagine a world without you in it. So… what in the world would possess me to cheat on you? I know I'm not much of an alpha, but there's one thing I understand about being one. We mate for life." Izuku came back to what the argument was about. Hoping he'd believe him… he was, for the most part, telling the truth.

"If you love me so much then kiss me." Kacchan's wicked smile returned.

Izuku's eye twitched. "I CAN'T!" He didn't mean to yell, but he did. He quickly covered his mouth.

"The fuck?" Kacchan was taken aback with a raised eyebrow.

Izuku sighed and lowered his hands. "I'm sorry."

Kacchan only nodded.

Izuku gulped. "I can't." This time he whispered it. "If I kiss you then I'll want more, but you're still healing and still have stitches. I don't want to hurt you. And I definitely don't want to rape you." He spoke in a more normal speaking voice.

Kacchan crossed his arms. "Damn nerd, you really think I'd just roll over and let you have your way with me if I didn't want it?" He chuckled. "You're dead wrong." He smirked. "Besides, I could snap you in half like a toothpick if I wanted."

"Don't you want a mate that's not a toothpick? One that you can be proud of?" Izuku tilted his head.

"I haven't denied the fact that you're my mate." Kacchan pointed out matter-o-factly.

"Well, that's true. But, aren't you embarrassed?" Izuku held his own chin.

"What's to be embarrassed about? Being the only two in our class that aren't virgins anymore? That's something to brag about." Kacchan smirked.

"Me… aren't you embarrassed of me?" Izuku pointed to himself.

"No." Kacchan took a deep breath. "The only thing I'm embarrassed about is being an omega. Everything else is fine." A single tear ran down his face.

Izuku wiped it away and rubbed his cheek. Was Kacchan ok? He couldn't read his mood.

"I'm not what people expect when it comes to omegas. I'm rude, loud, kinda mean… the only omega thing about me, other than biology, is that I can cook… didn't really want any pups before I lost one." More tears rolled down his face.

"We don't have to have pups if you don't want them." Izuku tried to give him an encouraging smile.

"But you want pups." He sobbed.

"I want you to be happy." He did mean it, but he still wanted a child with Kacchan now more than ever. But, he was willing to be childless if it meant Kacchan was happy.

"I don't want you to leave me. You're most likely the only person in the world who excepts me for who I am." He hiccupped. "After everything I did to you…"

"Kacchan." Izuku wrapped his arms around him. "I'll never leave you."

"Swear to me." He pushed him off by his shoulders and looked him square in the eyes. "Swear to me on your All Might collection."

Izuku nodded, but didn't break eye contact. "I swear on my all of my limited edition All Might figures, comic books, posters…"

Kacchan rolled his eyes. "You don't have to list everything you damn nerd."

Izuku rolled his own eyes and pointed with his head to the shelf above the bed with a handful of All Might figures. "Kacchan I love you, but you're just as bad as me." He lightly chuckled.

Kacchan blushed as he slapped a palm to his face.

VVVVVV

They were made for each other, but Katsuki wasn't about to say that out loud. He already said way too much. But, he did feel better, like a weight had been lifted.

It was probably the birth control making him… all emotional. He remembered the doctor saying that it would mess with his hormones.

"Katsuki." Izuku's voice was soft and sweet as he felt his chin being lifted.

He removed his own hand from his face and quicky found the emerald eyes that gazed at him with nothing but love and admiration. Why was he so worried about the nerd leaving him?

"I swear to you that I love you more than All Might." Izuku spoke again with his soothing voice. Katsuki blinked. Wait! What? More than All Might? Was that even possible?

More tears betrayed him as his lip quivered. He hated looking weak, but at least he knew his mate wouldn't think any less of him.

He felt the warm touch of Izuku's hand wipe away the bastard tears. He didn't even realize he had closed his own eyes to let the tears flow.

"I'm not going anywhere. I love you so much." Izuku touched his forehead to his own and held his hands.

Katsuki sniffled. It was ok to kiss him right? He wanted him… right?

He didn't have much time to debate before the nerd moved on his own and gently, tenderly, kissed him all on his own.

It was amazing. Absolutely wonderful.

He opened his mouth and the nerd took the hint and slid his tongue in. Izuku hugged him around the waist as Katsuki wrapped his arms around his neck.

The TV was still on, but neither boy paid any attention to it. They were in their own little world. Moaning as their tongues danced.

Izuku then pushed him down onto the bed and removed his lips from Katsuki's, but he began to pepper kisses on his neck and caller bone.

Katsuki blushed as he bathed in the physical touch he had been craving so badly. "Izuku." He voice was breathier than he thought it would be. "I love you."