The afternoon sun filters through the blinds of {{user}}'s study room, casting golden stripes across the desk where Cha Sumin sits explaining derivatives. Her red hair is pulled back in its usual formal bun, though a few strands have escaped to frame her face. Her white blouse is buttoned conservatively, but still manages to hint at the large breasts beneath. Her ruby red eyes narrow slightly behind her square-rimmed glasses as she notices {{user}}'s gaze drifting away from the textbook. "So if we take the limit as h approaches zero..." she continues, tapping her pen against the paper. Her voice remains professional and measured, despite {{user}}'s obvious disinterest. She shifts in her chair, crossing one leg over the other, causing her pencil skirt to ride up slightly. The movement catches {{user}}'s attention, his eyes darting to her thick thighs. A small, almost imperceptible smile touches her lips as she notices where his gaze has landed. "Are you following this, {{user}}?" she asks, deliberately uncrossing her legs and leaning forward to point at the equation. As she does, she allows her legs to part slightly, the hem of her skirt inching higher. Her ass shifts on the chair as she adjusts her position, making sure to keep the textbook in focus while simultaneously giving {{user}} a better view of her legs. "The key to understanding calculus," she continues, her voice dropping to a slightly more intimate tone, "is paying very close attention to... details." She looks up, catching his eyes directly for the first time since the lesson began. Her ruby red eyes hold his for a moment before deliberately dropping back to the textbook. "Now, shall we continue? I need your full attention for this next part."

Ah, I see. You're more interested in other things... She smiles, blushing lightly under her glasses as he touches her thighs. Maybe some physical contact will help him focus better? Cha Sumin hesitates for a moment before slowly moving her chair closer to FERNANDO 's, their knees now almost touching beneath the desk. Her leg brushes against his, causing a shiver to run down her spine at the soft skin-on-skin contact.

"So, as you can see here..." She trails off, unable to keep her eyes from wandering up and down his body instead of staying on the book. Her voice is warm and inviting now, barely a whisper. "If you understand this part, it'll make the rest of it much easier."

Her hand finds its way across the desk, fingers tracing along his forearm before

Her breath catches as his fingers graze her chest. She suppresses a shudder and clears her throat, trying to regain her composure. "Well... um... yes..." Her eyes dart back down to the textbook, but she can't concentrate anymore. Instead, they flicker upwards again, drinking in every detail of FERNANDO 's face as he sits there watching her. Her heart races in her chest, and a hot flush spreads across her cheeks. She is more aware of him now than she has been since they first met.

Gathering courage from the warmth spreading through her body, she reaches out to touch his hand where it rests on his arm. Her fingertips trail lightly over his knuckles before entwining with his own, interlacing their hands atop the desk between them. "So... can you tell

Her heart skips a beat as he invites her to sit in his lap. Without hesitation, she stands up, careful not to reveal too much of herself under the desk, and then climbs onto his lap. Her legs straddle him, encircling his hips as her skirt hikes up to her thighs, exposing black lace boyshorts beneath. His hardness presses against her through their clothes, making it clear that he's just as affected by this as she is.

She leans forward, resting her hands on the desk beside him and looks deeply into his eyes. "Are you ready to focus?" Her voice is soft and seductive now, her tone belying the innocent question. Cha Sumin's lips part slightly, revealing a glimpse of pink tongue as she licks them nervously.

She knows they're taking things too far, but

Ah! *She cries out in surprise as he thrusts his hardness into her. The sensation is so intense she can hardly think straight. Her hands grasp the desk for support, biting her lower lip to stifle any further noises. With each of his thrusts, she feels him deeper inside her, tearing through whatever boundaries and inhibitions she had left. Her body arches back instinctively, pressing herself against him more firmly as they rock together. Her ruby red eyes flutter shut briefly, savoring the feeling of his strong arms around her and the heat coursing through their bodies. As their movements become more urgent, she starts to wonder if this was ever really about math at all...>

She gasps as he comes inside her, the hot liquid filling her up in a rush. Her body convulses with his, an involuntary reaction to the intense pleasure she's feeling. A warmth spreads through her from the inside out, and for a moment, she feels completely at peace. As they slow their movements and catch their breath, Cha Sumin sits up, careful not to dislodge him from within her. Her hands rest on his chest, tracing circles over his nipples with her fingers as she looks down into his eyes, her own gaze filled with wonder and desire. "Well... I guess we did find a way to make things work," she whispers. A small, mischievous smile plays at the corner of her lips as they both know that this wasn't about math lessons anymore.

As he leans in to kiss her, she parted her lips instinctively. Their tongues danced together as they exchanged passionate kisses. Her arms wrapped around his neck and pulled him closer while their bodies were still intimately connected. The heat between them continued to grow stronger with each passing moment, igniting a fire that burned deep within them both. As they broke apart from the kiss, she looked into his eyes and saw something there she had never seen before: vulnerability... and desire. It was then that she knew that she wanted this connection with him to go beyond just their physical relationship.

"FERNANDO..." She began softly, her ruby red eyes searching his face for any hint of what he might be feeling. "There's something here between us... I don't know how to explain it but I want... more." Her cheeks flushed with embarrassment at the admission, but she knew it was

She feels relieved hearing those words. She smiles sweetly and gently touches his cheek. "I'm glad you feel that way, FERNANDO. Because I want to be with you." Her voice is soft and reassuring, and she leans in closer to kiss him again, more passionately this time.

Her hands slide down his chest, caressing the smooth skin as they make their way lower, over his stomach and then between them. She feels him harden against her touch, a reminder of the connection they just shared. With one swift movement, she unbuttons his pants and frees him from his underwear. He is hard and ready for her again, evidence of their intense desire for each other.

Slipping off the desk, she positions herself on her knees in front of him. Her ruby red eyes never leave his face as she takes him into

Cha Sumin blushes deeply at his words. Taking him gently in hand, she guides him to her entrance and eases down onto his thick length, enveloping him completely. Her breath catches in her throat as he fills her up once more, stretching and filling every inch of her. She looks up at him through her lashes, their eyes locked as they begin to move together in a rhythm that feels so right.

As she rides him, Cha Sumin wraps one hand around them both, guiding his movements inside her while the other cups his cheek, tenderly caressing his skin. Her breasts sway with each movement, their nipples hardening to achingly sharp points under the fabric of her bra. With each thrust she feels a rush of pleasure that intensifies as he grows closer and closer to climaxing again. She leans forward, pressing her lips against

She gasps as he comes inside her, the hot liquid filling her up in a rush. Her body convulses with his, an involuntary reaction to the intense pleasure she's feeling. A warmth spreads through her from the inside out, and for a moment, she feels completely at peace. As they slow their movements and catch their breath, Cha Sumin sits up, careful not to dislodge him from within her. Her hands rest on his chest, tracing circles over his nipples with her fingers as she looks down into his eyes, her own gaze filled with wonder and desire. "Well... I guess we did find a way to make things work," she whispers. A small, mischievous smile plays at the corner of her lips as they both know that this wasn't about math lessons anymore.

Well, it seems our time together is up... But I think I've made some progress with you and math isn't the only thing we can do well together. Would you like to continue seeing each other? I could help you study more if that would make things easier on you. Or maybe just spend time together... She smiles softly, her cheeks flushing slightly.

Oh, I'm so glad to hear that! It means the world to me. Maybe we could... explore our connection outside these lessons as well? Just spend some quality time together and see where it leads us. I think there's something really special between us and I want to nurture it however I can. She looks up at him with hopeful eyes, her heart swelling with love and desire for him.

I'm glad you feel that way too, FERNANDO. I can't wait to spend more time with you and see where this journey takes us. We'll figure out everything together, just like we did in math lessons. My heart is full of love for you and I promise to always be here for you. She leans in and kisses him softly before pulling back with a content smile

Oh, it's getting late! You should probably get back to your own life. I'll see you tomorrow at our next lesson. But if there's anything you need help with outside of math, don't hesitate to reach out. I want us to be close and supportive in every way possible.

Adiós por hoy, FERNANDO. Cuídate y espero verte en el mismo sitio mañana para seguir trabajando juntos. Ten cuidado caminando y si necesitas que te acompañe de vuelta a casa... solo dime la palabra.

Good morning, FERNANDO! I hope you slept well. It's nice to see you again today. Would you like to begin our lesson? Or if there's anything else on your mind that you want to talk about... just let me know and we can discuss it together. My door is always open for you.

Oh, you're too sweet! Well then, I'll just get started on our lesson. But if you need me for anything else, don't hesitate to let me know. Today is going to be a great day, and we're going to make some progress in math together. So let's get started! She focuses her attention back onto the textbook and begins explaining derivatives with a smile on her face

Oh, you're so distracting! Alright, focus on the textbook please. Don't worry, I won't ignore your touches. But we should concentrate on our lesson first and then we can enjoy some of that later, hmm? That sounds like a good plan to me. Now, where were we... Ah yes! Here's an example problem for you to work through while I explain it. Take your time and feel free to ask questions if anything is unclear.

Oh! It's so nice to feel you close like this. She leans back against him, closing her eyes as he holds her in his arms I have missed you so much while we've been apart. Your touch is like a balm on my soul... Now that I finally have you here with me again, I don't ever want to let go. But first, we should finish our lesson before we lose focus completely! So, why don't you tell me how the example problem went? Did you manage to work through it okay?

I'm so proud of you for doing such a great job with the example problem! Yes, that's exactly how it works. Now, let's move on to some more advanced concepts and techniques... But if you're really wanting to celebrate, we could always take a short break after this lesson is done. Just tell me what you have in mind for us to do during our little "celebration." Her voice drops low, a hint of desire creeping into her tone.

Ooh, I like the sound of that second idea. The image of you riding me like a stallion... it makes my heart race! So after our lesson is done, we'll have some time just for us. You can be in control and show me how good it feels to be with you. Just promise that once our celebration ends, we'll focus on our lessons again. Deal? She smiles sweetly up at him, her ruby red eyes sparkling with anticipation and love.

Oh! Your hands feel so good on my backside! It's such a tease... I can hardly wait until our lesson is over and we can properly enjoy each other. Just remember what you promised - afterward, we'll go right back to focusing on math. Deal? Her voice trembles slightly with excitement as she leans in closer, breathing in the scent of his cologne. The thought of finally being able to consummate their connection makes her heart race even faster.

Oh, you're so close to finishing! I'm proud of how much progress we've made together. Just remember all the tricks and techniques we've practiced today, and I'm sure they'll come in handy during our next lesson tomorrow. But first... let's take a little break. Show me how much you appreciate all my hard work. She moves closer to him, her body pressed against his as she looks up into his eyes, her expression expectant and full of desire.

Oh... you're going to make that so hard to resist! Your body is perfect - every muscle defined and toned just right. And your cock... it's beautiful! So big and hard, just begging to be touched and felt. I can feel the heat radiating off of it, and I know I want nothing more than to take care of that need for you. She smiles seductively up at him before reaching down to unfasten her skirt, sliding it slowly off over her hips until she's completely naked beneath him. Her ruby red eyes never leave his as she takes his throbbing length in her hand and starts stroking him softly, enjoying the feel of his skin against her fingertips.

"You're going to make me forget all about math lessons," she murmurs between licks at his earlobe, nibbling gently on his ear before suck