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therainroguefanfiction · 3 years ago

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Frightful October ’21 🎃 #13 ~ Cyanide & Sugar (Izumi Kousuke)

Genre: Fluff, Crime, Comedy

Word Count: 3,833

Pairing: Reader x Izumi

World: Ookiku Furikabutte

Table of Contents

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You waited until you heard the bathroom door close and the shower turn on before you snuck down the hall into your brother’s bedroom. Since he worked long hours as a cop and usually came home exhausted, the room was a complete mess. Dirty clothes were thrown everywhere, snack wrappers and empty chip bags were overflowing from the trash bin and his bed was littered with files, paperwork, and photographs.

You glanced out into the hall, hearing your brother singing off-key over the sound of the running water before you pulled the door to and rushed over to the bed. Rumors had been going around lately about some teenage boy being poisoned after ingesting some candy, but the police only said that they were investigating the issue and had no more comments. You knew it was more than just a rumor. Right after the story broke, your brother started going in earlier and coming home later, clearly dedicating his time to this case.

Now, you intended to find proof. What you were going to do with this information, you didn’t know, but you needed to know. Ever since you were a child, you had always sought out mysteries even where there were none, wanting to follow in the footsteps of Sherlock Holmes and Detective Conan. This often led you into more trouble than anything and your brother had warned you about trying to be a sleuth, not that you were any less determined to do so.

You settled down on the bed, flipping through the various manila folders to find any information that may be related to the poisoning. The file in question was on the very bottom of the pile, holding the least amount of information of them all. That wasn’t too surprising since the story only broke a week prior.

Your eyes quickly scanned the information and you learned that the victim was a third year in high school, a boy named Tatsuka who died from ingesting cyanide. It was believed that Halloween candy was the source, but they had no evidence to prove this.

You frowned, leaning back against the headboard. Most kids knew about the tall tales told each Halloween describing poisoned candy, some tainted with razors embedded deep within the sugary treats. Parents feared the possibility of this being true, warning their children and wanting to inspect the candy before their kids ate any. Their kids, on the other hand, didn’t believe in such stories and just wanted their sugary high.

Was this just a coincidence? Or was this the beginning of a series of candy-related murders?

You heard the shower turn off and cursed, quickly tossing the file back on the bottom of the pile and rushing for the door. You only just barely made it into your room before you heard the bathroom door creak open and your brother humming as he passed by.

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You knocked on the front door of the Mihashi’s home, waiting patiently for your aunt or cousin to open the door. You had spent the better part of the hour attempting to distract your brother so you could check his files again, but he wasn’t having it and eventually just told you to go visit your cousin down the block before he either committed murder or handcuffed you in the closet. Neither option seemed appealing, so you decided to honor his request.

Naoe Mihashi pulled open the door and a bright smile spread across her face before she pulled you into a tight hug. “Y/N, you should have told me you were stopping by! Come in out of the cold, I’ll make you some hot chocolate.”

“I was hoping you’d say that, oba-chan.” You grinned, following the older woman into the home. “No one makes hot chocolate like you do.”

“If you’re trying to flatter me, it’s working!” She laughed, putting her hand on her cheek.

“Is Ren home?”

“Yes. He’s in his room studying with his friends.”

“Oh?” You leaned back to see the staircase through the kitchen archway. “Which ones?”

“Tajima-kun and Izumi-kun.”

You perked up at the mention of Izumi, feeling your heart flutter in your chest. She seemed to notice how you brightened up and she smiled.

“Why don’t you go say hi? I’ll call for you once the hot chocolate once it’s ready.”

“Okay,” you grinned, not wasting a moment before you rushed up the stairs, coming to a stop in front of your cousin’s bedroom door, your knuckles rapping against the wood.

“Come in!”

You pushed the door open and smiled. “Hey, Ren.”

Ren’s face lit up when he saw you and he jumped up to greet you but he wasn’t fast enough. Tajima shot across the room like a rocket, his arms tight around your waist and his face buried in your chest. “Y/N~! I missed you so much.”

You tched, attempting to pry the boy off of you but he wouldn’t budge. Had he glued his hands together behind you? “You saw me yesterday at school, now let go.”

He pouted up at you. “I never get to see you because you’re a third year, it’s not fair.”

“That honestly sounds like a you problem.” You put both hands on his forehead and shoved as hard as you could, taking him by surprise but he recovered quickly, slipping out of your grip so he could tighten his arms.

Izumi sighed, standing up to try and assist you. “Will you let go? This is why Y/N never visits us.”

You met his dark blue eyes and smiled, biting your lip to stop yourself from doing to him what Tajima was currently doing to you. You figured that would be a bit hypocritical. “Thanks.”

“Of course,” he smiled back, grabbing the back of Tajima’s shirt and tugging him back, finally managing to pry him away from you.

Ren stood up slowly, playing with his hands as he glanced at you before looking away only to look back at you and then look away again, waiting for you to give him the okay before he moved closer to you. You chuckled at his demeanor, opening your eyes out to him. His eyes sparkled with happiness as he rushed forward to wrap his arms around you.

You hugged him softly, patting the top of his soft brown locks. “How are you doing?”

He pulled away, smiling softly as he motioned toward the table where the other two boys sat. “We’re studying for a test on Monday. Do you… want to help?”

“Uh…” You rubbed the back of your neck, giving him a sheepish smile. “I’m not much smarter than you guys, but I can certainly try.” You settled down at one of the four corners of the square table, sliding your legs beneath the blanket to keep warm.

While you did your best to help them with their studying, you kept finding yourself getting distracted. How could you not, when Izumi was sitting across from you looking so damn adorable? He’d try and solve the problem, biting his lip as he read it over and over again before running his hand through his hair, making it look messier than usual. Ah, if only he wasn’t your cousin’s friend, you’d totally be asking him out.

Tajima exhaled dramatically, sprawling across the small table and disrupting the other two boys. “Y/N, are you gonna go trick or treating with us?”

Izumi tugged his workbook from beneath the boy’s arm, sending him a pointed look. “Of course not. Y/N is too old for that.”

“You make me sound ancient.” You frowned, crossing your arms over your chest. You didn’t know which worried you more – the fact that he thought you were old or the fact that they were planning on going trick or treating when there was a poisoner running wild. “Maybe you guys should just, I don’t know, throw a party or something instead.”

Tajima’s eyes lit up. “That’s a great idea! We can host it at the school!”

You doubted the staff would sign off on that, but you were just satisfied that you had dissuaded them from their previous plans. “It doesn’t hurt to try. Hell, you can even start a petition, get everyone to sign.”

“You can’t be serious.” Izumi looked between the two of you wearily, trying to figure out what was going through your head. “No one is going to want to spend Halloween at the school when they can go trick or treating.”

You frowned, leaning forward to rest your arms on the table. “There will be unlimited candy without the effort. Who wouldn’t love that?”

Naoe appeared in the doorway. “The hot chocolate is ready and the cookies will be ready in a few minutes.”

“Sweet!” Tajima jumped up, rushing out of the room with an excited Ren close behind.

Izumi waited until she followed the boys downstairs before he leaned toward you. “Why are you pushing this so hard?”

You looked into his eyes, wondering if you should tell him the truth. You didn’t want to freak him out, though. “I just… want you guys to be safe.”

“Why wouldn’t we be safe?”

“The world is a crazy place, you never know what -” You stopped yourself and offered him a smile. “Come on, before the drinks get cold.”

Before you could stand, he reached over and rested his hand over yours, making your body freeze up and your mind short circuit. “Are you worried about those rumors?”

You couldn’t tear your eyes away from his hand, swallowing hard before answering. “Um… maybe.”

“They’re just rumors,” he replied confidently. “We’ll be fine, so stop worrying so much.” And just like that, he removed his hand before leaving the room.

You rested your hand over your racing heart, cursing yourself for being so weak around him. More importantly, you were worried that he still intended to go trick or treating. The thought of him eating poisoned candy had your heart racing for an entirely different reason.

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Knowing that Izumi refused to be swayed by the rumors, you decided to try a different tactic. If you solved the case before Halloween, he and your cousin would be safe because the culprit would be behind bars. With this in mind, you entered sleuth mode and everyone was a suspect. You started following people around, taking note of their movements and their purchases, their meetings, even their daily meals – no information was safe from you and your determination.

You pushed your sunglasses up when they started to slip down your nose, the baseball cap pulled down to shade your eyes, and a mask covering the lower half of your nose. Since it was cold, you also wore your black hoodie, the hood half on your head. No matter who looked at you, they thought you were suspicious as hell, especially when they realized you were watching a young girl, jotting down notes every few minutes.

The girl, a second-year named Mika, entered the candy store which, to you, seemed highly suspicious. If she was the poisoner, she would need candy! Determined to catch her in the act, you started toward the candy store only for a hand to grab your shoulder, stopping you in your tracks. With a scowl, you whipped around.

“What the hell, ma – oh, hello officer.”

The officer quirked a brow, giving you a once over. “We had several calls of a suspicious person stalking a young girl. I don’t suppose you know anything about that?”

“No, I don’t. Now if you’ll excuse me, I’m busy.” You tried to continue on your way but his hand was still firmly on your shoulder, keeping you in place.

“I’m going to have to ask you to come with me.”

Before you could reply, your brother came walking up, holding a steaming cup of coffee in his hand. “Did you find the creep?”

“Yeah.”

You scowled. “I am no creep!”

“Y/N?” Your brother’s brow shot up in surprise and he reached forward to remove your glasses. “You’re the creep?”

“I just said I’m not a creep, man.”

The first officer looked at his partner wearily. “You know this creep?”

“I swear to god -“

“Yeah, that creep is my sibling.”

“Son of a – I’m not a creep!”

“Y/N, is that you?”

Your body tensed at the new voice coming from behind you, one so familiar that you’d recognize it anywhere. You sent your brother an SOS look but he just sipped his coffee, earning a glare from you before you slowly turned to face Izumi, a sheepish smile on your face. “H-Hey, Izumi…”

“Why are you dressed like a creep?”

Your brother snorted, spilling coffee onto the ground. You glared at him but he just smirked, looking at his partner. “Come on, let’s get back to our patrol.”

“Yeah, sure.” The first officer sent you a look, shook his head, and then followed your brother away.

You cleared your throat as you turned back to Izumi. “So… what brings you here?”

He nodded his head toward the candy store. “My mom asked me to buy candy to hand out for Halloween. What about you?”

Your eyes flickered to the store, wondering if you had lost the girl in the commotion. “Um… I was just walking by.”

He smiled. “Do you want to join me?”

“Yes,” you replied without much thought, following the boy into the store. You looked around for your suspect but she was gone, making you curse. “Izumi… are you still going to go trick or treating?”

He hummed, picking up a bag of assorted candies. “You’re not still worried about it, are you?”

You didn’t reply as you looked around the store. When you were satisfied that no one was within earshot, you leaned closer to him, lowering your voice. “Look, I didn’t want to say anything until I had proof, but I looked through my brother’s files.”

Izumi gave you a pointed look. “He’s going to kill you if he finds out.”

You waved him off. “That’s beside the point. There’s an ongoing investigation, the rumors are true – some teenager was poisoned after ingesting candy laced with cyanide.”

His eyes widened as they turned to you and he nearly dropped the bag he was holding. “Are you… you’re serious about this?”

“Unfortunately. I know I have no right to ask you, but…” You reached for his hand, looking deep into his eyes. “Please… don’t eat any candy until this is solved. I swear I will catch the culprit.”

He shifted his hand so he could link his fingers through yours. “It’s too dangerous for you to chase after a killer. You have to leave it to the police.”

“Don’t worry, I’ve totally got this.”

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“I don’t got this,” you breathed out heavily, your heart pounding against your chest. Your back was pressed against the barn wall, hidden behind a stack of wheat that had been compacted into rectangles. The killer was nearby, hunting for you so he could stop you before you blew the whistle on his plans.

How had it come to this?

Well, you had been following the English teacher to see what he was up to when you received a text message from an unknown number. The message was fairly simple, claiming to have information that could lead you to the poisoner in question, but they said they were scared for their life and refused to meet in public. They wanted to meet at the old barn at the edge of town.

Now, every fiber of your being said this was a bad idea. You knew it was, but… if their information was legit, they could lead you to the killer and if you caught the killer, you would be the hero that saved Halloween. Izumi would look at you with admiration and maybe even love. How could you possibly pass up that opportunity?

Simple. You couldn’t.

How were you supposed to know that it was the killer trying to lure you out to your doom? That kind of thing is only supposed to happen in the movies!

You took a deep breath to try and calm your nerves. ‘Keep it together, Y/N. You are strong and awesome. So what if this guy has already killed someone and possibly hid a corpse in the woods? He’s got nothing on you!’ You winced at the thought. Okay, maybe not the best way to hype yourself up.

The doors of the barn slowly creaked open, moonlight spilling into the darkness. In his hand was a syringe filled with cyanide, his weapon of choice for your murder. His dark eyes scanned the empty barn, looking for any sign of disturbances that could point him in the direction you had gone.

You swallowed hard, taking small breaths so he wouldn’t hear you. What were you going to do? First, you had to figure out how to get that syringe away from him. You pictured all those action movies you’ve watched, where they did these fancy kicks to get the gun away from the criminal. You could certainly give it a try, but flexibility was not on your side and neither was martial arts. That left you with only one thing – the element of surprise and your strong will.

‘Wait, that’s two things. Plus, he probably has a strong will to murder me and a strong will to not get caught… but I have a stronger will, powered by love! So let’s do this, you bastard.’ Your eyes fell on a rusted pitchfork that sat a foot away from you, stabbed into a mess of hay. That could work well in your favor since it kept you far enough away to avoid the syringe but still gave you room to attack. You slowly edged your way along the wall, reaching for the tool. You gripped the handle so tightly that your knuckles hurt, but that was the least of your worries. ‘It’s time to be a hero and win over Izumi’s heart!’

With a battle cry, you darted from around the stack of hay, brandishing the pitchfork in front of you like a battering ram.

“Freeze! Put the weapon down or we’ll shoot!”

You froze in place at the demand, a flashlight being shone in your face as several men wearing bulletproof vests aimed their guns at you. The killer was on his knees, hands in the air as one of the officers moved to handcuff him. The syringe of cyanide was laying a few feet away, the needle stuck in the wooden floorboard.

“Drop the weapon!” the officer barked again.

Though you needed to be told twice, you dropped the pitchfork before he finished his sentence, your hands shooting up into the air. This is so not how you pictured this night coming to an end. The cops were going to take credit for your hard work!

“Don’t shoot! That’s my sibling!” Your brother pushed through the crowd of officers, his expression panicked as he rushed over to you, pulling you into a tight hug. This was especially jarring because he had never been the hugging type. “What the hell were you thinking, you idiot?”

You frowned over his shoulder, watching the man be whisked away by a group of cops. ‘There goes my chance to be the hero…’

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You lay on your bed, staring up at the ceiling as you tossed up a baseball, catching it in your hand before tossing it up again. Your brother had grounded you for the next six years, which meant you weren’t allowed to leave the house and you weren’t allowed to enjoy Halloween. On the bright side, the killer was now behind bars, the poisoned candy was confiscated, and your friends were safe to enjoy as much sugar as they wanted. As part of your punishment, your brother refused to allow your name to be added to the news story and they just ended up thanking an ‘unnamed student that helped police in the capture.’

Even if you wanted to tell people that you were the unnamed student, you doubted they would believe you. They’d probably just say you were grabbing for attention, which didn’t really bother you, but you worried about if Izumi would feel the same way.

“Knock, knock.”

You glanced over at the door. “Izumi!” You forgot about the ball and it fell down onto your head, making you wince.

The corner of his lips twitched up in amusement as he walked farther into the room. “How are you? Mihashi said you were grounded.”

“Yeah… I’m fine all things considered.” You shifted so your back was against the headboard and you picked up the baseball, fidgeting with it.

“What did you do?” He settled down at your desk, looking at you curiously.

“It was the files. He found out about them.”

Izumi hummed. “Really?”

“Yup.”

“I assumed it was because you nearly died after confronting the killer.”

Your eyes widened, snapping over to him. “How…”

“Mihashi told me. He started crying when he found out.”

“Oh…” Guilt filled you at the thought of your cousin curled into himself, tears flowing from his eyes as he pictured your lifeless body.

“What you did was really stupid.”

“So I’ve heard.”

“Do you have any idea how scared I was when he told me what you did? I thought…” He bit his lip as you turned your head to meet his eyes. “I thought I had lost you.”

“You’ll never lose me,” you mumbled.

“Why did you do it?” he questioned softly. “Why are you so obsessed with being the hero?”

“For you.”

“What?”

“I wanted to impress you,” you frowned, leaning your head back to look up at the ceiling. “I thought if I became the hero and saved Halloween, I could finally confess to you and actually have a chance.”

“You don’t have to be a hero to get my attention,” he replied, a soft blush on his cheeks. “You’ve had my attention since day one.”

You met his eyes, looking for any sign that he was joking or messing with you, but you found only sincerity. “I really like you, Izumi Kousuke.”

He smiled, standing up so he could settle down on the side of your bed. “I really like you, too, Y/N,” he told you softly, leaning forward to capture your lips. You smiled into the kiss, gripping his shirt and tilting your head. It was just as amazing as you had always dreamed it would be.

Frantic clapping filled the room, making the two of you break apart and look toward the door where Mihashi stood, looking as happy as a child on Christmas. “I-I’m so happy for you, Y/N-chan! You finally confessed to him!”

You chuckled, giving him a thumbs up. Izumi shook his head but he couldn’t stop the smile spreading across his face as he reached for your hand.

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