Izuku 11years old

Izuku peered around the tree in front of him looking all around him trying to catch his blonde haired best friend. Tag was their favorite game. Always trying to see who could hide the best or run the fastest. All to see who could be the number one hero. Scanning the yard, Izuku heard some dirt scuffle a few trees ahead of him. Tip toeing he snuck around the trees being careful of where he stepped not to make a sound. Jumping out from behind the tree Izuku tackled his friend and pinned him to the ground. "Gotcha!" He yelled and smiled down at the red eyes peering up at him. Izuku was strong, but Kacchan was stronger.

Kicking his legs, Kacchan flipped Izuku on his back so he was positioned on top of him. There was a look on Kacchans face that Izumu had never seen before. Before he could react Kacchan firmly pressed his rough lips on his. He felt his heart race, and his palms get sweaty. His mind went blank. Suddenly there was an explosion next to him, and he heard Kacchan scream. He curled into the fetal position and screamed for his mom. Without thinking about it Izuku ran inside and got his mom to help his hurting friend.

"What happened?" Inko asked as they ran out to the screaming boy on her lawn.

"We were playing and he-"Izumu decided to skip the kissing part. "His hands went off and he fell over." Inko had a sympathetic look on her face. Tears streamed down his face as he watched his best friend in so much pain for a reason he didn't understand.

"Kastski honey it's okay now honey. I'll take care of you." Picking the screaming boy up she put him in the back seat of the car, having Izuku sit with him to keep him as comfortable as she could while she sped to the hospital.

As soon as we got there he was immediately taken into a room, Inko refused to leave the boy alone until he parents arrived. They gave him a shot that seemed to help him stop crying, but Izuku still had tears sliding down his face. He was so scared for his Kacchan he didn't know what to do. Walking up to him he tried to grab his hand to comfort him and Kacchan pulled away.

"Get away from me, Deku!" He screamed and the tears that pooled him his eyes fell. Izuku ran out of the room crying and ran to the front of the hospital.

Only a few moments passed when Inko came to find him. She sat next to him on the sidewalk, and put her arm around him softly rubbing her shoulder. She explained to him that Kacchan had developed as an omega, and was experiencing his first heat, which was extremely painful. She explained about Alphas, and Betas and Omegas trying to be as clear as she could that kids starting around their age and as he get older he would Develop one of those as well. Drying his eyes, Inko picked up her tear stained little boy and took him home. It didn't take much for him to fall asleep. All of the fear and crying had exhausted him. He went to sleep thinking about his best friend, the kiss, and the mean words that were screamed at him.

—

Kacchan 5 years later 16 years old

Kacchan barely had any contact with Deku after that night, as much the nerd tried to be friends or help him in any way in school. It always made him lose his mind when he had the audacity to try and help him. Just because he was an omega didn't mean he was weak. Developing into an omega was the last thing Kacchan wanted for himself. He didn't know what any of that was when it happened to him, and since then his suppressants have been working with little issues. Kacchan always has an authoritative personality as thinking back on it wanted to know why he wasn't an alpha. Deku hadn't had his awakening yet but if someone as strong as him was an omega, a weakling like Deku would be too. Walking into class someone bumped into me causing books to crash to the ground around me.

"Hey watch where you're walking, ya damn extra." I spat before making eye contact with a pair of emerald eyes. My mouth went dry as I saw Deku flinch at the sound of my voice.

"K-kacchan I-I'm sorry-" His voice floated through my ears. My body froze, and my heart rate was spiking. It was harder to breathe. I could feel the nitro swell in my palms. Punching the locker next to the door I felt the pain radiate through my hand. Running through the courtyard I made it to the forest behind the school.

"Fuck!" Screaming I blasted the closest tree to me. I could feel the heat spread though my body as my anger grew. The pain flushed through my entire body. I fell to the ground as I tried to reach my backpack I threw on the ground. A delicious scent flew through the air. I took a deep breath trying to inhale as much as I could. My omega went crazy at the smell. The scent got stronger, and I opened my eyes to see where it was coming from.

"Kacchan!" The familiar velvety voice rang through my heart, and I saw a blur of green rush to my aid. I felt a hand on my face, and my skin flushed at the sensation.

"Fuck o-off Deku.." I tried to fight my urges that were burning through my body. I wanted his hands all over my body, I wanted to taste his skin. I wanted him to taste me.

"Where is your suppressant?" His voice was urgant, demanding. My omega was raging.

"Ba-bag" moaning out the response. I looked up at his flushed face. I realized how beautiful he was. Stupid Deku's freckles popping out of his flushed cheeks. I heard him rummaging through my backpack. Feeling his hands on my shirt, he pushed it up exposing my stomach. I winced as the needle went in my stomach, and my pain immediately decreased. I panted, being able to breath.

"Don't worry Kacchan. I'll take you home." My body felt weak. I couldn't move. My stomach flipped as I was hoisted in the air. My head flopped and I nuzzled into his warm neck.

"P-put me d-down, nerd." I spat. Taking a deep breath his scent ragged through my nose, and helped ease the knots in my stomach. I held on as my green haired hero jumped me from school to my room in record time. I heard him kick my door open and set me on my bed. My heart stung in my chest as I felt him pull away from me

"S-stay." I whined. My head was spinning. I couldn't think straight.

"I shouldn-" his voice was low and I cut him off.

"Please..D-Deku." I whimpered.I felt low having to bed him to stay, but the moment I felt him climb into bed next to me all my guilt went away. I curled up in his lap, putting my head on his chest. I hadn't had an episode like this in over three years, the pain was unbearable. Moving slowly I rolled my hips into legs, grinding my very swollen dick against his strong leg. I hand rubbed down his chest until it hit the edge of his shirt. I forced my hand to go back up his chest under his shirt. "Kacchan, do you know this is me?" I ignored him, and continued to slide my body against him, feeling the pit in my stomach beg for release.

"S-shut it, nerd. I c-cant s-stop.." my words were harsh. I felt his body tense but he didn't complain, I felt his hand flow through my hair, and my body wanted to explode at the feel of his skin.

"Mmpph.. I-I'm c-close.." moaning danced around the room.

"Y-you smell so.. Mmmmnh, good." My body moved without control, I barely realized my hand was moving untilI I grabbed the bulge in his pants.

"Oh god.." I managed to choke out. Feeling how hard his cock was sent me over the edge. My back arched, I felt tingles down my entire body as my throbbing cock spilled cum into my boxers. Letting the air out of my chest, I felt the wet spot on my leg. The pain that flooded me was gone, and my exgustation hit, not caring that I just came by rubbing myself against my ex best friend. My eyes fluttered and I gave in the dark.

Stirring awake I groaned at how sore my body was. Taking a deep breath, my body froze. I smelled him. My eyes shot open as I remember what happened in this bed before I fell asleep. Sitting up looking around, I took a deep breath. I was alone. It was dark, but my Desk light was turned on. Standing up I realized I was not wearing the same clothes I was in earlier. Instead a pair of pajama pants, and a clean T-shirt. Heat flooded my cheeks when I realized that Deku changed me before he left. My heart sunk, and tears streamed down my cheeks. Once again my omega has flared up but around Deku leaving me feeling vulnerable and exposed.

Allowing myself time to cool off I went out of my room and found my mother sitting on the couch. I sat next to her and leaned my head against her shoulder.

"Hi baby." Her voice was sweet. We usually go off on each other but when it came to my heat she was super sensitive to me, which I appreciated.

"Izuku told me you went home early today because of your heat. Have you been taking your meds?" I nodded into her shoulder.

"We'll both take tomorrow off and take you to the doctor okay? You might need a stronger dose now that you're older and more alphas are maturing around you." Wishing I could fall into my own skin I nodded. Dekus scent drove me wild, but he hasn't matured yet. Deciding I didn't care enough to fight anymore I went to the kitchen to some extra spicy Katsudon. Enjoying each bite I let my mind wander back to Deku. I couldn't face him anymore- not after this.

Throwing my hood up I walked into the doctor's office with my mom. I hated going to this office, it was an omega specialist office. Keeping my head down I sat in a waiting room chair, my mom checking me in with the nurse up front.

"Bakugo." The nurse said a few moments later. Jumping up she escorted us into a room. Sitting on the examination table I felt my hood being yanked off my head. Scowling I shoved my hands in my pockets. After several questions from the nurse we waited for the doctor.

Dr. Yuga Shegota entered the room and asked my mom to leave the room for some more intimate questions.

"How has your heats been?" He asked, getting straight to the point.

"Fine." I muttered. He sighed.

"Look, Kid. I can't help you if you aren't honest with me." Scowling, I took a deep breath.

"They've been getting.. A little stronger." I admitted. "The medication was still working, but my..urges get really strong at the beginning of my heat."

"Have you mated yet?" His question flushed my cheeks. I couldn't form words.

"I'm an Omega too, Bakugo. I'm not going to judge you for any of your answers. I can help you."

"No." I answered.

"Well, you're getting alot older now, and there must be alot of alphas developing around you. Is there someone who you trust to help get you through your heats?" He asked. My thoughts flashed to yesterday, his emerald eyes peering down at me. I shook my head.

"Unfortunately, Your heats are going to continue to get worse if you can't find a way to settle your desires. Do you touch yourself?" His questions startled me.

"No.. w-well y-yes. S-sometimes." I managed to spit out. My hands were sweating so much I could smell the nitro building on my palms, as I wiped them on my shorts.

"I'm going to offer you some advice. When you feel your heats starting to come try taking care of yourself a few times a day. It will help the pain, and make it more comfortable for you. I will be increasing your dosage as well to help suppress more of your discomfort. Most importantly. Remember, when you become sexually active, you need to make sure you wear condoms. STDS are very common for young omegas who start experimenting. You can very easily get pregnant during your heats, if your partner is male." My eyes widened, I never thought about that before. "Everything your body feels is natural. Bakugo. No matter who your partner is." He adds trying to soften the mood.

"Do you have any questions?" He asked, and I shook my head. He opened a cupboard and gave me a small paper bag, filled with condoms and packages of lube.

"One more piece of advice, using lube helps alot. Solo or with a partner." He gave a gentle smile before leaving the room.