Da Vinci

"Come in, Shirou," a calm voice beckoned from the workshop.

Shirou stepped through the doorway, his eyes immediately drawn to the figure standing before a workbench cluttered with an array of mystic codes.

"Da Vinci, how are today?" he inquired, his gaze shifting from the scattered papers to the woman, who looked like Mona Lisa had come to life.

Da Vinci glanced over her shoulder, her shoulder-length brown hair sweeping aside to reveal the piercing blue eyes, and a voluptuous figure that seemed to challenge the very fabric of clothes she wore. "Ah, Shirou, I'm fine," she said with a warm smile. "I've been expecting you. I have something that requires your... Assistance."

Her words hung in the air, filled with a hint of excitement and desire. Shirou felt his heart skip a beat as he approached her. The scent of ink and aged parchment mixed with a faint aroma of oak and something... distinctly feminine.

Da Vinci turned to face him fully, her eyes glinting with a mischievous spark, leaned against the bench, her fingers idly tracing an intricate trinket. "You might know, Shirou," she began, her voice dropping to a sultry whisper, "That Chaldea's command spell are much weaker than the original created by the Zouken Makiri,"

"They can't make servant to things... Against their will," she added with a knowing look.

Shirou felt his cheeks warm slightly, understanding the implication behind her words. "So you improved them?"

Da Vinci nodded. "Exactly. We'll few casters helped, anyways I've created a new command spell, one that can bypass their free will, but only for a short time and command can't to vague. It's crucial we test it," she said, her eyes searching his for any sign of hesitation.

Shirou took a deep breath, feeling a mix of anticipation and unease. He knew the gravity of what Da Vinci was proposing, but he also knew he could trust her. She had always been a beacon of wisdom and guidance within Chaldea. "Alright," he said firmly, "I'll help you test the spell."

Da Vinci's smile grew wider, revealing a hint of satisfaction. She placed a metal orb in his palm, and the metal felt warm, almost alive, to the touch. It melted and was absorbed into his hand, his command spell glowed gold for a sec before returning to red. "Good," she said, her voice a mix of business and seduction. "Now, let's proceed with the test."

She looked directly into Shirou's eyes and whispered, "Command me to do something I wouldn't do under normal circumstances."

Da Vinci's eyes searched his, a mix of anticipation and challenge. "Go on, Shirou."

With a deep breath, he whispered, "Da Vinci, I command you to..." His voice trailed off as he realized the gravity of the command he was about to give.

"Dematerialise your dress and walk on all four all the to my room," Shirou murmured, his voice thick with anticipation. He watched as the command spell took effect, the crimson glow around his hand pulsing stronger before disappearing.

Da Vinci's eyes widened in surprise, a blush spreading across her cheeks. For a moment, she remained still, then with a grace that defied the awkwardness of the situation, she began to dematerialise her clothing. The fabric dissolved into motes of light, revealing her nakedness to him. Her full breasts swayed slightly as she dropped to all fours, and she began to crawl towards the door, her movements feline and seductive.

Shirou watched, his breath shallow and his heart racing. He knew that under normal circumstances, she would never consent to such a thing, but the power of the command spell was undeniable. Her eyes held a mix of **** and a spark of excitement, as if part of her was eager to explore this depraved fantasy.

Da Vinci reached the doorway and looked back at him, a question in her eyes. He nodded, his voice hoarse with desire, "Continue." He couldn't believe the words coming out of his mouth, but there was something about the power he held, something intoxicating.

Her cheeks flushed even more deeply, but she didn't protest. Instead, she began to crawl, her movements sinuous and deliberate. He walked behind her, giving him full view of her round, firm buttocks and vagina.

On their way to Shirou's room, they passed by few servants who couldn't help but stare in astonishment at the sight of the great Leonardo da Vinci moving on all fours. She had to bite her lip to suppress a moan as she felt his eyes on her, his desire palpable in the air. Shirou's hand was trembling slightly as he held the command spell, the weight of his power and the depravity of his command hitting him.

Once in his room, and door behind them close. The air was thick with tension as Da Vinci looked up at him, her eyes wide and pupils dilated, her body language begging for his next command.

"Da Vinci, let's test how long the command lasts" he said, his voice low and commanding, "Climb on my bed, I want you to fuck your own pussy with your fingers but I forbid you from Cumming."

Her eyes widen, but she complied, moving onto the bed with a grace that seemed almost feline. She positioned herself on her back, her legs spread wide, and began to touch herself, her eyes locked on his. The room was silent except for the sound of her breathing and the faint wet sounds of her fingers delving into her folds. Shirou could feel the tension in his own body, his cock growing hard as he watched her.

Da Vinci's hand moved with a practiced rhythm, her fingers teasing and spread her folds, her other hand sliding down to fill her wetness. She was an erotic canvas, painted with passion and obedience, and he was the artist with the brush of command. He watched, transfixed, as her body began to respond to her own touch. Her breaths grew quicker, her chest rising and falling as she grew closer to climax.

Her eyes never left his, and Shirou could see the internal conflict within her. Part of her was embarrassed, but another part was undeniably turned on by the situation. She moaned softly, her legs quivering as she pushed herself closer to the edge.

Shirou's own desire grew, watching her body respond to his command. He could feel his heart racing in his chest, his breaths growing shallower.

He approached the bed, but didn't touch her yet, just watching as she followed his order, her own fingers plunging in and out of her wet pussy, her body shaking slightly with each stroke.

"Keep going," he said, his voice a mix of command and urgency. He could feel his own erection straining against his pants, demanding to be released.

He stepped closer to the bed, his own need now unbearable. He unbuckled his pants, letting them fall to the floor. His erection sprang free, standing tall and proud. He began to stroke himself in time with her movements, his hand moving with the same rhythm as hers.

Da Vinci's eyes followed the motion of his hand, her own movements becoming more erratic as she watched him. She licked her lips, and her breathing grew even more ragged.

Shirou stepped closer to the bed, his hand moving faster over his cock. He felt his climax approaching, his balls tightening.

He positioned himself so the cum would land on her face. "I'm going to cum," he warned, his voice strained with arousal.

Da Vinci's eyes grew wide, and she nodded, her own hand movements becoming erratic as she watched him.

With a final, powerful stroke, Shirou climaxed, the hot spurts of cum arcing through the air. He aimed for her face, the warm liquid hitting her cheeks and nose, painting a messy picture of lust. She gasped, her eyes watering slightly from the sensation, but she didn't flinch away. Instead, she leaned in, her tongue darting out to catch a droplet on her bottom lip.

Shirou watched, his breathing heavy as he finished, the last of his seed spattering her chin and neck. The sight was indescribable, a masterpiece of eroticism that no painting could capture. He felt a rush of power and satisfaction, knowing that his command had brought her to this point.

Da Vinci's hand remained in her pussy, her breaths coming in short gasps. "Please, Shirou," she whispered, her eyes pleading. "Allow me to finish."

Shirou's eyes narrowed, and he considered her request for a moment before shaking his head. "No," he said, his voice firm. "The test isn't over."

Da Vinci whined, her body begging for release, but she obeyed his command, her hand stilling moving inside her.

Shirou took a seat in the chair by the bed, his erection still standing proudly. He watched the wall clock, timing the effects of the command spell.

Da Vinci's hand remained still, trapped in her own body's betrayal. Her face was a picture of frustration and arousal, her cheeks flushed, and her chest heaving with every breath.

Shirou sat in the chair, watching the clock tick away the seconds, his own desire waning as the command spell held her in its thrall. The room was suffused with the musky scent of arousal, and she was a picture of unfulfilled need.

By the 10 minute mark most of bedsheet was soaked with her juices. The spell had pushed her arousal to unbearable heights, but she remained on the edge of orgasm, unable to climax. Her face was a mask of desperation, eyes glazed over and mouth slightly open as drool trickled down her chin. Her breasts heaved with each ragged breath she took, her nipples erect and sensitive from her own touch.

Da Vinci's hand was still lodged in her pussy, fingers unmoving as she whimpered, her body trembling with the effort to not give in to the pleasure. The sight was both erotic and slightly disturbing to Shirou, but he remained steadfast, studying her reaction with a mix of fascination and scientific scrutiny.

By the 30 minute mark, bedsheet was full soaked in juices, drool and sweat. Her breathing had become shallow pants, and her entire body was covered in a fine sheen of sweat. Every muscle of her body were twitching with the effort of not letting herself go over the edge, pupils dilated to the point where her blue eyes looked almost black.

Da Vinci's fingers remained buried deep within her pussy, moving as the spell held her in its thrall. Her back arched off the bed, her breasts bouncing with every sharp inhale she took, the nipples dark and hard from her own teasing.

"Da Vinci, You're doing well," Shirou said, his voice tight with restrained lust as he watched the clock tick away the minutes. The power of the command spell was evident in the way she fought against her body's urges. "But I need to go help Boudica in the kitchen," he said, standing up from the chair. "If spell wore off while I'm gone, mark the time."

She didn't respond to his words, her mind too consumed by the overwhelming desire that the command spell had kindled within her. Shirou's gaze lingered on her for a few more seconds before he dressed and left the room, leaving her in the grip of unfulfilled ecstasy. The door clicked shut behind him, and she was left alone with the echo of his footsteps fading into the distance.

1 hour and 30 mins later, Shirou returned to his room, his curiosity piqued to see if the command had worn off yet. When he entered, the sight that greeted him was nothing short of breathtaking.

Da Vinci was still on the bed, her hand unmoving inside her, juices were literally dripping from the sheets on the floor. The room was hot, the air thick with the scent of desire and frustration.

Shirou's cock twitched again at the sight, "You really out done yourself, Da Vinci," he said with a smirk, "these command spells are truly dangerous."

"Hmm, let's wait for few hours, if the effect hasn't worn off, I'll have on the casters look at you," Shirou said, his voice laced with dark amusement. He knew the torment she was feeling, but the scientist in him was fascinated by the limits of his newfound power.

Da Vinci's only response was a soft moan, her eyes glazed with need. She could feel the spell's grip tightening around her will, her body screaming for release, but she remained obedient.

In the end, 6 hour since her masturbating punishment, the command spell's power waned. Her body jerked and she screamed in pleasure as she finally climaxed, her legs spasming around her hand, her eyes rolling back in her head.