can you perhaps write a yandere kazuha fic 👀👀👀
hope u like it
Perfectly Insane | Yandere! Kazuha Nakamura
pairing: popular!kazuha x Best friend! y/n
synopsis: When popular mean girl Kazuha crosses paths with her returned childhood best friend Y/N, an old bond quickly spirals into a dark, suffocating obsession that Y/N never saw coming.
The morning bell rang, echoing loudly through the crowded hallways of Oakwood High. Kazuha was leaning against her locker, checking her lip gloss in a small compact mirror. She was wearing her varsity cheerleading jacket, her long hair perfectly styled.
Around her stood her usual clique—Chloe, Jessica, and her boyfriend Mike, who was leaning against the locker next to hers, spinning a football in his hands.
Kazuha was the undisputed queen of the school. She was beautiful, rich, and notoriously mean. If you weren’t in her circle, you didn’t exist. And if you got on her bad side, she would make your life a living hell.
"Hey, Kazuha, look over there," Chloe whispered, nudging Kazuha’s arm and pointing toward the main office. "The principal is walking around with that new transfer student. God, look at her sweater. It’s so oversized and ugly. She looks like a total loser."
Kazuha closed her compact mirror with a sharp snap and smirked. A cruel, bored idea popped into her head. "A new target? Perfect. Let's give her a proper Kingsley welcome."
Kazuha walked over to the nearby janitor's closet, grabbing a large plastic bucket. She dragged it to the water fountain and filled it to the brim with freezing, ice-cold water, tossing a few ice cubes in for good measure. Chloe and Jessica giggled, acting as lookouts near the side entrance where the new girl was walking.
"She’s coming, she’s coming!" Jessica hissed.
The heavy door swung open. The new girl stepped inside, looking down at a map of the school. Before she could even lift her head, Kazuha stepped out from the corner and dumped the entire bucket of freezing water straight over her.
"Welcome to our school, loser!" Kazuha laughed loudly, tossing the empty bucket to the floor.
The hallway erupted into loud jeers and laughter. The new girl stood completely frozen, drenched from head to toe. Cold water dripped heavily from her hair, soaking her large sweater and splashing onto her sneakers. Slowly, she raised her hands and wiped the water away from her eyes, pushing her wet hair out of her face.
When she finally looked up, Kazuha’s laughter instantly died in her throat.
The color drained from Kazuha's face. Her breath hitched, and her hands began to tremble.
The girl standing in front of her wasn't a stranger.
It was Y/N.
Her childhood best friend.
The only person who had ever truly cared about Kazuha before her family’s messy divorce five years ago, forcing Y/N to move to another country.
"Y-Y/N?" Kazuha whispered, her voice cracking.
Y/N didn't yell.
She didn't cry.
She just looked at Kazuha with a calm, deeply disappointed expression. It was a look that cut Kazuha deeper than any insult could. Without saying a single word, Y/N turned around and walked down the hallway toward the girls' locker room to dry off.
"Y/N! Wait!" Kazuha panicked. She completely forgot about her friends, her boyfriend, and the crowd of students watching her. She ran down the hall, bursting through the doors of the girls' locker room.
Y/N was standing by the sinks, wringing out the bottom of her wet sweater.
"Y/N, I'm so sorry!" Kazuha begged, her eyes wide with frantic desperation as she tried to get closer.
"I swear, I didn't know it was you! It was just a stupid prank. If I knew you were coming back, I would have never—"
Before Kazuha could finish her sentence, Y/N raised her hand and placed her palm gently but firmly over Kazuha’s mouth, instantly shutting her up.
"It's okay, Kazuha. Shut up. You don't have to explain anything," Y/N said softly, pulling her hand back. Her voice was completely empty of anger, which somehow made Kazuha feel even worse. "I get it. You're different now. I guess the popularity really ate you up. You're just a bully."
"No, Y/N, that's not true! Please listen to me—" Kazuha pleaded, reaching out to grab Y/N's hand.
But Y/N just pulled away, grabbing her backpack. "I need to go to the office and get a change of clothes. Don't follow me." She walked past Kazuha, leaving her standing alone in the cold locker room.
Over the next two weeks, Kazuha completely lost her mind. A dark, suffocating possessiveness took over her.
She couldn't sleep, she couldn't eat, and she couldn't focus on anything else.
Y/N was back, but Y/N was treating her like a ghost, and Kazuha couldn't stand it.
She tried everything to get close to Y/N again.
During lunch on Tuesday, Y/N was sitting by herself at a lonely corner table in the back of the cafeteria, reading a book. Kazuha walked over, carrying a tray loaded with expensive pastries, snacks, and Y/N’s favorite strawberry milk.
"Hey, Y/N," Kazuha said, forcing the sweetest, brightest smile she could muster as she sat down across from her. "I remembered you love this milk. I bought it from the convenience store across the street just for you. Let's eat together, okay? Just like old times."
Y/N didn't even look up from her page. She calmly closed her book, picked up her backpack, and stood up. She walked away to the library without saying a single word, leaving Kazuha sitting alone at the table while the whole cafeteria stared.
The next day in history class, the teacher announced a group project. Kazuha instantly raised her hand.
"Teacher! I want to be partners with Y/N!"
Y/N stood up immediately, her face completely blank. "Teacher, can I please just work alone? I prefer doing projects by myself."
The teacher blinked, confused, but nodded. "Uh, sure, Y/N. That’s fine."
Kazuha’s grip on her pencil tightened so hard it snapped in half. She glared at the back of Y/N's head, her eyes turning dark and vacant.
'Why are you doing this to me, Y/N?' she thought, her heart twisting painfully. 'Why won't you just look at me?'
By the third week, Kazuha’s friends were getting completely annoyed by her behavior.
During the afternoon break, Kazuha was standing in the crowded main hallway, leaning against a locker, her eyes completely glued to Y/N who was organizing her books down the hall.
Chloe rolled her eyes loudly, crossing her arms. "Seriously, Kazuha, stop acting so pathetic. Why are you spending so much time trying to please that loser? She’s a nobody. It’s not like she’s important or anything."
Something inside Kazuha’s brain snapped.
SMACK!
The sharp, loud sound of Kazuha’s hand slapping Chloe’s cheek echoed violently across the entire hallway.
The crowded corridor instantly fell into a dead, terrifying silence. Students stopped dead in their tracks, staring in utter shock. Chloe stumbled backward against the lockers, clutching her bright red cheek, tears instantly welling up in her eyes.
"Don't you dare call her a loser," Kazuha hissed. Her voice wasn't her usual mean-girl tone; it was incredibly low, cold, and dripping with pure malice. Her eyes looked completely dead, staring at Chloe like she wanted to erase her from existence. "If you ever speak her name with your disgusting mouth again, I will make sure your family loses everything in this town. Try me."
"Whoa, Kazuha! What the hell is wrong with you?!" Mike, her quarterback boyfriend, stepped in angrily.
He grabbed Kazuha’s wrist tightly, pulling her back. "You’ve completely lost it! You can't just slap Chloe over some random nobody girl! Calm down!"
Kazuha violently ripped her wrist out of Mike's grip. She turned her icy, murderous glare onto him, letting out a sharp, dark laugh. "Get your hands off me, Mike. And I told you, don't call her that."
"Babe, I'm your freaking boyfriend! I'm trying to help you!" Mike yelled, feeling humiliated in front of the whole school.
"We’re done," Kazuha said bluntly, her voice as sharp as a knife. "We are breaking up right now."
Mike blinked, totally stunned. "What? Are you crazy? You’re breaking up with me because of her?"
"No, I'm breaking up with you because you’re a pathetic, cheating piece of trash," Kazuha sneered, stepping closer into his space, her eyes wild with rage. "You think I don't know? I know you’ve been sleeping with Sarah from the track team, and Emily from the junior class, and God knows who else. You're disgusting, Mike. You're nothing to me. Y/N is the only one who matters in my life!"
Mike’s face went completely pale. He opened his mouth to argue, but the sheer, dangerous insanity in Kazuha’s eyes kept him frozen.
Kazuha was breathing heavily, her chest heaving up and down as the adrenaline rushed through her veins.
She felt exposed, angry, and completely out of control. Another student nearby mumbled something under their breath, and Kazuha instantly raised her hand again, ready to swing and slap whoever else dared to open their mouth.
But before her hand could land, someone grabbed her wrist from behind, stopping her mid-air.
"Get your hands off—" Kazuha spun around, ready to scream, but she suddenly froze. A familiar, incredibly soft vanilla scent hit her nose—the exact perfume Y/N had worn since they were kids. Kazuha looked up and saw Y/N holding her wrist. Y/N didn't look angry; she just looked deeply tired of all the chaos.
Without saying a single word to the shocked, whispering crowd, Y/N tightened her grip on Kazuha’s wrist and began pulling her down the hallway, dragging her away from Mike, away from the drama, and straight out into the empty courtyard behind the school.
Kazuha didn't fight back at all. She just stared at Y/N’s back, a twisted, incredibly happy smile slowly forming on her lips as she let herself be pulled away. She touched me, Kazuha’s mind screamed in ecstasy, her heart pounding with a dangerous, dark excitement. She finally looked at me.
The courtyard was completely empty, the cool wind blowing through the trees. The moment they were hidden behind the tall brick walls, Y/N finally let go of Kazuha’s wrist.
Kazuha immediately stepped closer, her eyes wide, scanning Y/N’s face.
"Y/N... you saved me back there. I knew it. I knew you still cared about me. You saw what Mike did, right? He’s disgusting. Everyone here is disgusting. They don't understand how important you are to me."
Y/N let out a heavy, exhausted sigh, leaning her back against a concrete pillar. She rubbed her temples, looking at Kazuha with a deep frown. "Kazuha, please. Just stop."
"Stop what?" Kazuha asked, her voice instantly dropping into a soft, innocent whine. She reached out, her fingers trembling as she gently clutched the sleeve of Y/N’s jacket. "I was defending you. Chloe called you a loser. I couldn't just let her say that to you."
"You slapped her, Kazuha! You almost started a riot in the hallway!" Y/N said, her voice rising in frustration. "And the past two weeks? Buying me things, following me everywhere, trying to force yourself into my life? It’s too much. I told you, you’re a bully now. I don't fit into your world anymore, and I just want you to leave me alone."
Hearing the words leave me alone felt like a physical knife stabbing Kazuha’s heart. Her face went completely pale, and her eyes instantly filled with tears. The terrifying, aggressive girl from the hallway completely vanished, replaced by a pathetic, weeping mess.
"No... please don't say that, Y/N," Kazuha sobbed, dropping to her knees right there on the concrete, her hands desperately gripping the hem of Y/N’s jeans. She looked up with big, trembling eyes, tears ruining her perfect makeup. "I’m sorry. I’m so, so sorry about the cold water. I swear I didn't know it was you. If I knew, I would have protected you. Please don't hate me. Don't leave me alone again."
Y/N gasped, taking a step back, shocked by Kazuha's sudden breakdown. "Kazuha, get up! What are you doing? People might see you!"
"I only became popular because I was lonely!" Kazuha cried out, her voice cracking with desperate emotion as she clung tighter to Y/N's legs. "When your parents got divorced and you moved away, you left me all alone! I had nobody! My parents ignore me, and everyone at this school is fake. I built this mean persona so nobody could ever hurt me or leave me again. But it’s all a lie, Y/N! I hate them! The only time I was ever truly happy was when I was with you. Please... just give me one chance to make everything right. Let me prove that I can be the Kazuha you used to love."
Y/N stood frozen. She looked down at her childhood best friend, who was literally begging on her knees in the dirt, crying her eyes out.
Y/N’s soft, empathetic heart completely betrayed her. She remembered the sweet Kazuha from five years ago—the girl who used to share her lunch and cry when they had to go home. Seeing her like this made Y/N feel incredibly guilty.
Completely oblivious to the dark, calculating mind hiding behind Kazuha's tears, Y/N knelt down and gently placed her hands on Kazuha’s shoulders, pulling her up.
"Okay... okay, Kazuha, please stop crying," Y/N murmured softly, using her thumb to gently wipe a tear from Kazuha's cheek. "I don't hate you. I didn't know you went through all of that after I left. If you really want to change... if you promise to stop hurting people and stop acting like a bully... I'll give you a chance. We can try to fix things."
Kazuha’s breath hitched. She buried her face into Y/N’s neck, hugging her tightly. Y/N wrapped her arms around her to comfort her, so she couldn't see Kazuha’s face. She didn't see the way Kazuha’s weeping expression instantly shifted into a terrifying, victorious smirk.
She fell for it, Kazuha thought, inhaling Y/N’s vanilla scent deeply, her fingers digging possessively into Y/N’s back. She’s mine again. She’s finally mine.
The next few days were like a dream for Y/N. Kazuha completely changed her behavior at school. She officially resigned from the cheer squad, stopped talking to her old popular friends, and spent every single second with Y/N. She was sweet, attentive, and incredibly gentle. Y/N genuinely believed that her childhood friend was healing and becoming a better person.
On Friday evening, Y/N decided to surprise Kazuha. Kazuha had mentioned she was going to the grocery store to buy ingredients for a dinner they planned to cook together at Kazuha's house.
Since Y/N finished her extra study session early, she decided to head straight over.
When she arrived, Kazuha’s mother, who still remembered Y/N from years ago, unlocked the front door with a warm smile. "Kazuha is just down at the corner store buying some extra things, dear. You can go wait for her up in her room."
"Thanks, Mrs. Nakamura," Y/N smiled brightly, holding a small bakery box of Kazuha’s favorite pastries she had bought as a surprise.
Y/N walked up the stairs, her heart feeling light and happy. She reached Kazuha's bedroom door, which was slightly ajar, and pushed it open with her shoulder. The bakery box slipped from her fingers, hitting the hardwood floor with a soft thud, the pastries tumbling out.
The room was completely pitch black, except for a faint, eerie red glow coming from a string of LED lights wrapped around a massive corkboard on the main wall. Y/N took a hesitant, trembling step inside, her breath catching as her eyes adjusted to the dim, bloody red light.
The entire room was a shrine. And the shrine was entirely dedicated to her.
Hundreds of printed photographs covered every single inch of the walls. There were old photos of Y/N from five years ago, which made sense—but then Y/N saw the rest. There were hundreds of photos of her from the past three weeks.
Photos of her walking to school, taken from inside a car across the street.
Photos of her sitting in the library, taken through the window glass from the bushes outside.
Photos of her eating lunch, zoomed in so closely you could see the crumbs on her lips.
But the absolute worst, most horrifying part was the ceiling directly above Kazuha’s bed.
Enlarged, high-definition pictures were taped across the ceiling. Y/N walked closer, her body shaking violently with pure horror as she recognized the background of the photos. It was her own bedroom.
The photos had been taken from outside her bedroom window while she was completely asleep. There were close-ups of her sleeping face, her tangled blankets, her exposed shoulders.
Underneath the corkboard, a small glass table held a collection of bizarre items inside ziplock bags: a stray hair tie Y/N had lost last week, a half-empty water bottle Y/N had left in history class, and a piece of paper with Y/N’s handwriting, covered in dark red ink that repeated the words:
MY ONLY ONE. MY ONLY ONE. MY ONLY ONE.
"Do you like it?"
Y/N gasped violently, spinning around so fast she almost fell.
Kazuha was standing in the doorway. She was holding a grocery bag, but her expression wasn't the sweet, innocent face she had been showing Y/N all week. Her eyes were completely wide, unblinking, and vacant, reflecting the eerie red light of the room. A wide, twisted, manic smile stretched across her lips.
"K-Kazuha..." Y/N stammered, backing away until her hips hit the desk. Her heart was hammering against her ribs so loudly she could hear it in her ears. "What... what is this? Why do you have pictures of me sleeping?"
Kazuha closed the door behind her, clicking the lock into place with a terrifying click. She dropped the grocery bag onto the floor and slowly walked toward Y/N, her movements graceful but predatory.
"I told you, Y/N. I spent five years waiting for you," Kazuha whispered, her voice a terrifying mix of a sweet lullaby and dark madness. "When you left, I couldn't just let you go. I hired a private investigator in the country you moved to. I got reports about you every single week. I know every school you went to, every friend you made, every time you cried. I couldn't let anyone else have you."
"You... you tracked me?" Y/N’s voice shook, tears of pure terror finally spilling over her eyelashes. "For five years? You're insane!"
"I did it because I love you!" Kazuha giggled darkly, stepping right into Y/N’s personal space. She reached out and firmly gripped Y/N’s waist, trapping her against the desk. Her grip was like iron, completely impossible to break.
"And when your family moved back here, I was so happy. The cold water prank was a mistake, but it worked out perfectly, didn't it? You felt bad for me. You knelt down and comforted me. You gave me a chance." Kazuha leaned in closer, pressing her forehead against Y/N’s, staring directly into her terrified eyes with a gaze full of fanatical, dangerous worship.
"Don't look at me like that, Y/N. Don't be scared of your best friend," Kazuha breathed out, her thumb gently wiping away Y/N's tears, though her grip on Y/N's waist only tightened until it bruised. "I did all of this for us. You promised you wouldn't leave me again. You gave me a chance to make everything right. And I'm going to make sure we stay together forever... no matter what I have to do to keep you here."
