KnB One shots

Math Sucks (Izuki x Reader) Lemon

Requested by a really good friends of mine: Yumieyukii

You sighed, twirling your pencil in between your fingers as you gazed down in a lazy fashion at the jumbled mess on your once neat paper. At the start, it had been a perfectly clean, white, college rule sheet but after multiple tries and failures, it was almost unrecognizable. The edges were crinkled and ripped slightly and the surface was smudged with the remnants of what your eraser couldn't get rid of.

You felt frustrated, not only with yourself but with Geometry as well. Why did people have to make it so difficult? A square was a square, a circle a circle.... Who really needed to know how to calculate the missing angle of triangles or find the circumference of a circle unless you planned on being an architect?

Throwing your pencil down, you rested your head on your crossed arms, eyes following the writing utensil as it rolled dangerously close to the edge at the other end of the table. It stopped rolling for a moment and you held your breath, praying it wouldn't fall. But oblivious to your silent pleads, the pencil took a sudden and unexpected drop onto the floor.

"Convenient..." you muttered sarcastically under your breath, debating on whether or not you should get up to grab it.

A dark haired male stopped in front of the table and bent down, picking up your fallen pencil before turning to face you.

"Ah, thanks Shun" you smiled up at your boyfriend.

He nodded and sat next to you at your dining room table, staring at the work in front of you.

"Having trouble?" he asked, skimming over the math you knew you had done wrong.

"Just a bit" you let out a small and shaky laugh, unable to suppress the feeling of embarrassment that was growing. "I know the formula: pi r^2-"

"Pie aren't square, pies are round!" Izuki gave you a triumphant smile as he waited to see if he had to explain his pun to you.

Mentally, you facepalmed because you found it a little lame plus you were trying your hardest to be serious.

He saw the look you gave him and quickly said, "Okay, okay. One more and I promise that's it."

You closed your eyes and waited, deciding it was better for him to get it out of his system than to have him hold it in the whole time.

"Why is six afraid of seven?"

"Why?"

"Because seven, eight, nine!"

He gave you a sort of goofy smile that made it possible for you to forgive him the instant the pun left his mouth. You smiled back at him, the frustration from before fading away to almost nothing.

"Alright, let me help you..." he stated, sliding your book and paper across the surface of the table toward him. You moved closer to him, peering over his arm as he wrote out a problem an worked it out, explaining it step by step as he did so. He went slow, stopping every so often to make sure that you understood what he was doing. He didn't want you to become confused and thus discouraged by a problem that seems daunting at first but turns out to be one of the most easiest things you have ever done.

"Now you try" he commanded, passing the paper back to you.

Taking in a deep breath, you gripped your wooden pencil tightly and pressed the sharpened point to the paper. For the first time that day, you took your time working it out, calculating things with care and double checking.

When you finished, you held your paper out to Izuki and beamed, proud of the work you had accomplished. He returned the smile you gave him and nodded as a sign that you had received the right answer. Turning back to your book, you felt a pair of lips press themselves to your temple, the sensation soft and warm.

"Shun!" you exclaimed, turning your head back to him. "What are you doing?"

"I'm rewarding you for getting the right answer... I hear it's the best way to learn and retain knowledge" he whispered seductively into your ear, sending his warm breath over your sensitive skin. You shuddered as goosebumps crawled across your shoulders and chest, leaving you unable and unwilling to protest.

He wrapped his arms around your waist and pulled you onto his lap, resting his hands on your hips. You couldn't help but gasp at the feeling of his clothed erection up against your own crotch. It made you feel weird and warm, causing you to shift slightly on top of him. He pulled back from your neck and groan, closing his eyes and resting his head on the back of the dining room chair.

Giving him a rather questionable look, you moved back and forth once more, creating a pleasurable friction between the both of you. The grip on your hip tightened, his long fingers digging into the fabric of your skirt. You panted, grinding against him, biting your lips as pleasure gave way to frustration.

Your fingers fumbled with the zipper of his jeans, eager to get rid of any and all things in the way of what you both wanted. His hands drifted up from your waist and snagged the hem of your shirt. Carefully, he lifted your shirt up and over your head, placing it down on the table behind you.

Once his pants were unbuttoned, you reached around and unhooked your bra, letting it fall to the floor beside the chair. Izuki lifted his hands to your chest, glancing up at you to make sure it was okay. You nodded with a small smile and he placed his hands on your now exposed breasts. He kneaded them gently, afraid that doing it any harder would hurt you. A ragged moan pushed past your slightly parted lips as you leaned your head back, enjoying his reward a little more than you knew you should be.

You pawed at his boxers, breaking his concentration and almost, almost breaking him. He blinked slowly at your action and then realized what you had been wanting. He smiled wholeheartedly at you before gripping your thighs and slipping out his member.

"Are you sure about this, (F/n)-chan?" he asked, peering into your twinkling eyes.

Biting your lip, you nodded, a bit worried about the outcome.

"Calm down, (F/n)... Please, I don't want to do this if you aren't going to enjoy it as much as I will" he pleaded, brushing a strand of your hair back behind your ear with tentative fingers.

"I-I know" you answered nervously, not willing to let this chance slip. "And that's exactly why I love you... Why I want you."

You shared a brief smile before he pushed your underwear aside with care and positioned himself at your entrance. Closing your eyes, you gripped his strong shoulders tightly as he pushed in rather slow. You took your time adjusting, giving him the okay when the pain had dulled down. He drew in a sharp breath and grabbed your hips, pulling you up a bit before bringing you down upon him.

He groaned freely, a sound that was not at all shameful in his mind. You wrapped your arms around his neck and rested your head on his chest, breathing heavily on his neck. His fingers massaged small circles on your clothed hip as he took it slow, vowing to give you as much satisfaction as he had.

Soon your stomach grew tight and you pushed yourself off of him, leaning back as you took charge. The pressure drove you insane to the point where you started to move your hips, matching his power almost perfectly. His eyes had grown slightly wide but he said nothing, and after a moment he accepted it.

"S-Shun... I-I-" you tried, only to have him kiss you on the lips.

"I know. Me too" he reassured you after pulling back.

A moment afterwards, your stomach uncoiled with the arching of your back and the tightening of your walls around him. He, too, climaxed upon feeling the constriction of your insides. When you were ready, he picked you up off of his lap and set you on your feet, handing you your shirt. Sheepishly, you accepted it and pick your bra from off the floor.

"Perhaps I should help you with math more often" he thought out loud, giving you a wink. "You seem to get a lot more work done that way..."