❦Katsuki X Midoriya's Little Sister

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The class of 1-A all had conversation filled with laughter and smiles throughout the day. Midoriya sat in his seat with a shaky smile on his face. Uraraka stood next to him along with Iida, and Todoroki.
"Why do you look so happy?"
She asked while putting a hand on his desk.
Midoriya smiled up at her.
"I'm just excited for the new transfer student coming in today."

Katsuki rolled his eyes. It wasn't that big of a deal to him and he didn't understand why it was such a big deal to Midoriya either. Midoriya literally lived with her so what good is it gonna do if they have the whole day together now? Behind Katsuki's strong face, he was happy himself. He was excited to have his childhood best friend in the smale class as him.

Aizawa opened the door signaling that class was about to start. Everybody rushes to their seats as Midoriya only smiles wider.
"We have a new student today."
On cue, the door is opened once again as a girl with Green hair and matching green eyes walks through the door. A smile forms on her own face as she sees Midoriya and Katsuki. Aizawa motions towards the class as he slides into his sleeping bag.
"Go on and introduce yourself."

She nods as she faces the class.
"Right. My name is (Y/N) Midoriya and I am Izuku's little sister."
Some of the class stands to their feet,
"Midoriya's little sister?!"
She nods as she rubs her arm nervously.
"Yes. I'm younger than him by 3 minutes. My quirk is called Shadowing. That gives me the power to overtake somebody by using shadows. The only downside is I can only use my quirk if there are shadows around. Not the best quirk, but I'm grateful. I already know Izuku of course and I also already know Katsuki."

"Whoa, you're already on first name status with Bakugo?"
Sero asks as he looks at the girl. She nods with a smile.
"Yup. I've known him nearly my whole life. I've even stayed the night at his house before."
Shock washes over the class once again as the unbelievable words leave her mouth. Katsuki growls as the class turns to him asking if it was true. A certain grapehead drools on his desk as he looks at the girl in the front of the classroom.

Glancing at everybody in the class, he notices how all attention is on Katsuki. Sneaking under his desk, he maneuvers his way through the legs of people in the class until he reaches the front. Nobody notices a thing until a scream leaves (Y/N)'s mouth which somehow doesn't wake Aizawa up. (Y/N) had dropped to the floor in embarrassment and somewhat fear.

Midoriya rushed to his sister's side as he grabbed onto her shoulder gently. The class falls silent as tears form in (Y/N)'s eyes. She was very emotional, just like her mother and her brother. Add that in with a pervert and you got something nobody wants. Katsuki stands to his feet with his head hung low and his hair covering his eyes. Stomping to the fantasizing grapehead on the floor, he picks him up by the head while turning to the window. Pulling his arm back, he lets off an explosion while launching him out the window.

The class watches the chaotic scene with wide eyes as Katsuki shoves Izuku to the side and helps (Y/N) up.
"You okay?"
She nods while smiling up at him. Mina jumps up from her seat as she pushes Katsuki out of the way causing him to hit Izuku.
"Hey there! My name is Mina Ashido aka your new best friend. Us girls could all meet down in the lobby of the dorms and all give you some tips on how to keep Mineta, the pervert that Bakugo just threw out the window, away from yourself."

(Y/N) smiles.
"That would be nice. I don't know where my dorm is though."
Denki jumps up from his seat this time now shoving Mina out of the way.
"I'll show you where it is!"

Midoriya steps in front of his sister with a somewhat dark look on his face.
"All of you, I will show her where her dorm is."
A scared look forms on Denki's face as he rubs his neck nervously. The bell decides to save the charger and dismiss the class before Kaminari could get any more scared. Izuku heads to his desk with (Y/N) following close behind to help him gather his things. Ochako waves at Izuku from the door.
"You coming, Deku?"
He looks at the door with sorrowful eyes.
"Oh, I'm sorry, Uraraka. I have to show (Y/N) to her dorm--."

"No. I'll show her her dorm. Go."
Katsuki's rough voice rings throughout his ears as (Y/N)'s soft hnd is placed on his shoulder while sending him a smile telling him that it was okay. This brings a smile onto Izuku's face as he slings his bag over his shoulder.
"Thank you, Kacchan."
Katsuki rolls his eyes as he hears Izuku's words. Izuku runs to Uraraka's side as they wave goodbye to each other. Katsuki begins to lead the way out of the school as (Y/N) smiles. They stepped outside as the cherry blossoms fell to the ground from the wind.

(Y/N)'s eyes looked up to Katsuki's hair as she noticed the few that had fallen into it.
"Katsuki."
He continued walking to the dorms as he had just thought she wanted to make small conversation on the way there. A soft hand latched onto his own causing him to stop in his footsteps. (Y/N) makes her way in front of the ash blonde as he watches her with his deep crimson eyes. Standing on her tippitoes, she reaches her hand up to his fully spiked hair. His eyes only widen slightly as he looks into her eyes that were focused on his hair and getting the petals out. The wind blows around the two as (Y/N) continues to pick the petals from his soft hair.

Now noticing his staring, she also looks into his eyes. They were always so pretty to (Y/N). Katsuki always hated when she called his eyes pretty. He would always say how it was too girly. A term used to describe a woman, not a man. (Y/N) didn't think so. She thought many things about Katsuki were pretty, just like a lot of other girls had thought about him.

Katsuki always thought (Y/N) was gorgeous. Everything about her. He knew there were many boys that had seen her before and thought the exact same thing and he didn't blame them. There would never be a day when Katsuki didnt think about how she could be swept away from him by anybody. But now Katsuki was going to take her away from the other guys.

Katsuki places one of his hands on (YN)'s cheek, running his thumb across the soft skin. His hands seemed to move on their own as they made their way down her body, taking their resting place on her hips. A petal fell into (Y/N)'s hair as (Y/N)'s soft lips moved against Katsuki's own. (Y/N)'s fingers wove into Katsuki's hair as his grip tightened on her hips only pulling her closer to him.

A loud screech brings the two back to reality and out of their own world together. (Y/N) looks to her side as a loud screech of her own fills the air.
"I-Izuku! I can explain! D-Dont tell mom!"
Izuku ignores her words as he approaches the two. Grabbing onto Katsuki's collar, Izuku looks at his childhood best friend with a deadly look.
"I don't mind if you date my little sister, but I swear if you break her heart I will break your face. More than you've ever even dreamed of breaking mine. Got it?"

Katsuki gets taken back by his sudden change of tone and personality.
"U-Uhh y-yeah.. I got it..."
Izuku returns to his normal self as he smiles while letting go of his collar.
"Good."
Izuku begins to make his way to the dorms with Uraraka and Iida as Katsuki regains himself while looking at (Y/N).
"Anyways. You belong to me now. You gut it?"
A smile forms on her face as she nods at his words.
"That's okay. Plus, It gives me more time to look into those pretty eyes of yours."

"They aren't pretty!"

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'Extended Ending'

It was now the weekend and the Midoriya siblings decided to pay their mom a visit as she offered to cook dinner for her children. Of course the two agreed as they were now sitting together at their small table for three eating their favorite dinner together. The small family sat in a comfortable silence. Izuku put a small piece of broccoli into his mouth.
(Cannibalism)

"(Y/N) is dating Kacchan!"

Inko coughs on her drink of water as she was not expecting the sudden outburst of news. (Y/N) slams her fist on the table.
"You said you wouldt say anything!"
Izuku looks at his sister with watery eyes.
"I'm sorry! You know I cant keep things from her!"

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