The Atelier of the Magic Pen: A Secret Contract with My Teacher
Coco, who just turned 18, has a talent for the 'Magic Pen' that can draw spells. She's now living alone with the great mage, Teacher Kieffrey. He's so kind, and he teaches her so many things. But when night falls, his demeanor changes completely.
'Coco, let's have a special lesson tonight.'
Whenever Teacher touches her, her body gets incredibly hot and her mind goes blank. It's so embarrassing, but she can't help wanting more. As their secret, lewd lessons continue, Coco finds herself falling
The Atelier of the Magic Pen: A Secret Contract with My Teacher - A Confession Under the Full Moon — A Promise Sworn Upon the Magic Circle
Day three.
Outside the window, night had long since fallen.
Coco sat on the bed, hugging her knees. When she buried her face in the pillow, the faint scent of her teacher still lingered.
*(Today, it ends.)*
The final night. Full moonlight streamed through the window, casting a pale blue square on the floor.
For these three days, Coco had outwardly gone about her usual routine. In the morning, she practiced magic circles. At noon, she ate with her teacher. In the evening, she tidied up. But inside, her heart was a tangled mess. Every time Kiefer showed those sad eyes, it pained her chest—yet she couldn't say a thing.
It happened two nights ago.
While practicing magic circles, she ruined the tip of her magic pen. She had gripped it too hard. Seeing the bent, limp tip, Coco nearly burst into tears.
"Don't worry about it."
Without a word, Kiefer brought out the repair tools and sat beside her. Side by side, they tended to the magic pen on the small desk. Kiefer's long fingers gently worked the broken tip back into shape. Coco couldn't say anything. She just watched.
*(Teacher is always like this.)*
He tries to show everything through actions, not words. But this time, that won't be enough.
*—He has to tell me everything.*
Coco quietly steeled her resolve and slept that night.
And now, the third night.
In front of the underground workshop door, Lucas and Elise were already waiting. Lucas, his platinum-blond hair neatly smoothed back, looked down at Coco without a flicker of expression. Elise leaned against the wall, her violet eyes gleaming darkly.
"It's time."
A low voice.
Coco nodded and looked up toward the top of the stairs.
"Teacher—please come."
Her voice didn't tremble.
Kiefer slowly descended the stairs. His silver hair swayed and shimmered in the light of the wall lamps. Behind his glasses, his ice-blue eyes gazed directly at Coco.
The four of them gathered in the underground workshop.
Through the small skylight in the ceiling, a thin shaft of full moonlight streamed down. The sealing magic circle drawn on the floor glowed faintly, pale and blue. It was the circle Lucas had destroyed before. Now, even its light was weak and feeble.
Coco stood at the center of the magic circle. The cold stone pressed against the soles of her bare feet.
"Teacher."
She clenched her hands tightly. Her fingers turned white.
"I want to know everything. About the research. About your lifespan—and the reason you cried that night."
Kiefer's shoulders trembled slightly.
Elise pushed herself off the wall. The hand that had been digging nails into the concrete fell limply to her side. Lucas stood before the workbench, holding a file of research records.
"Please—tell me everything."
Tears welled up, blurring Kiefer's face. But she didn't look away.
*A long silence.*
Kiefer slowly dropped to one knee.
He knelt on the floor, bringing himself to eye level with Coco. His ice-blue eyes wavered up close.
"...I understand."
His voice was hoarse.
Kiefer began to speak.
"What I was researching—was the Root Formula of Healing. A recreation of a formula sealed away by the Guild during the Magic Pen Corps War eighty-five years ago."
The sound of pages turning came from the file in Lucas's hands.
"It's a large-scale healing spell. Powerful enough to save dying soldiers on the battlefield all at once. But citing the danger of military application, the Guild sealed the formula."
Kiefer's voice echoed quietly through the underground workshop.
"I—continued the research regardless. Because I believed the true purpose of inscription magic isn't to harm people. It's to save them."
Coco's chest ached sharply.
"I lost comrades for the sake of this research. Elise informed on me. The Guild hunted me. Even after fleeing to this remote frontier—I couldn't stop. I couldn't afford to stop."
By the wall, Elise bit her lip. Her violet eyes were wide open.
"But—when the research neared completion, I understood. Activating this formula requires direct interference with the caster's mana circuits. As a side effect—the caster's lifespan is shaved away."
Kiefer's voice trembled.
"And the one person who possesses the mana conduction trait to serve as the activation key—as far as I know, in the entire world, it's only you, Coco."
Heat welled up deep behind her eyes.
*(I knew it—so that's how it was.)*
Tears glistened in Kiefer's eyes. The same tears she had seen that night in the basement. The single drop that had spilled over at the moment of climax.
"I—couldn't turn you into a tool. I couldn't complete the research at the cost of your lifespan. Because I love you—it's *because* I love you that I gave up."
Tears traced down Kiefer's cheeks.
"But I couldn't let go completely. The research, and you—I couldn't give up either one. I've been torn apart this whole time. Keeping secrets from you, yet still keeping you by my side—I'm the lowest kind of person."
His voice shook, drawing closer and closer to a sob.
"The reason I cried that night—was because holding you made me realize just how filthy I am. Your purity was so radiant—it hurt."
Kiefer bowed his head deeply. His silver hair spread across the magic circle on the floor.
"I'm sorry... truly, I'm sorry."
*—Silence fell over the underground workshop.*
Lucas silently checked the records. Only the sound of turning pages could be heard. Elise pressed a hand against the wall, her head hanging low.
Coco couldn't stop her tears.
But—it wasn't just sadness.
*(Teacher wasn't lying.)*
*(He shouldered everything—to protect me.)*
Coco roughly wiped her tears with the back of her hand. Then, she stepped forward.
She threw her arms around Kiefer's chest.
"I don't mind being a tool."
Her muffled voice resonated against Kiefer's chest.
"Honestly, I'd be happier if I weren't a tool—but even if I am, it's okay. As long as I can be by your side, Teacher, that's enough for me."
Kiefer's body went rigid.
"If my lifespan gets shaved away—we can just split it in half, right?"
She lifted her face and said it with a tearful smile.
Kiefer's ice-blue eyes widened.
Then—he squeezed her. He hugged Coco's body back, tightly.
"Coco..."
Kiefer's arms trembled. The hands wrapped around Coco's back gripped so hard it hurt a little. But—she was happy.
By the wall, Elise staggered.
*(To accept someone so completely like that...)*
She placed a hand on her own chest. The feelings she had directed at Kiefer for fifteen years. That wasn't love.
*(Mine... was obsession.)*
Pulling him close, trying to make him hers. Never once considering his feelings, his suffering, his wishes.
She had never had the resolve to give everything—defenselessly, straightforwardly—the way Coco did.
"...I see. I've lost."
She murmured quietly and moved away from the wall. Her usual provocative smile was gone, leaving only a tired expression.
The sound of Lucas closing the file rang out.
"Kiefer."
A cold voice echoed through the underground workshop.
"The research into the Root Formula of Healing falls under the category of forbidden arts. However—there is no intent of military application, and the caster herself wishes to continue with full knowledge of the cost. The sole inheritor of the mana trait serving as the activation key is Coco Hasenval."
Lucas continued matter-of-factly.
"Taking these three points together, continued research under Guild supervision is conditionally approved."
Coco's heart thumped hard.
"There are two conditions. Both Coco and Kiefer must submit to Guild registration and oversight. Progress must be reported regularly—that is all."
Kiefer slowly raised his head.
"...Approved?"
His voice was tinged with disbelief.
Lucas didn't answer. Instead, he took a single old piece of paper from the workbench. It was yellowed, its edges slightly singed.
"This may be of use."
He handed the paper to Coco.
When she unfolded it, it was a fragment of an old map. Thin ink lines traced mountains and rivers. In the corner, written in old script, were the words:
*—The Hidden Village of Vexler.*
Coco caught her breath. It was the name Elise had mentioned before. Back then, Kiefer had turned pale and denied it.
"Lucas, this is..."
By the time she looked up, Lucas was already walking toward the stairs. His back turned, he said nothing.
*(Why would Lucas have this?)*
For that cold inspector to bend Guild regulations and hand over this map—the reason was not revealed in the underground workshop that night.
Just before reaching the top of the stairs, Lucas paused for a moment.
"The schedule for regular inspections will be communicated at a later date."
With only those words, he left.
The next morning—
At the atelier's entrance, Elise stood with her luggage.
Her jet-black long hair caught the morning sun, gleaming lustrously as always. But her violet eyes held a quietness never seen before.
"Seems I was in the way."
Her usual sarcastic tone. But there were no thorns in her voice.
Coco stood at the entrance, gazing at Elise.
"I'm going back to the royal capital. There's nothing left for me in a backwater like this."
Elise paused for a moment, then looked at Coco.
"That foolish honesty of yours—I don't hate it."
Coco blinked in surprise. Elise—of all people—saying something like that.
But there was no hatred. Truly, with a feeling tinged with just a little pity, Coco spoke.
"Take care."
Elise gave a small laugh and turned away. Luggage in her arms, she descended the path toward Hasenval. Her back looked far smaller than usual.
In the afternoon, Lucas also left the atelier.
Alone together in the atelier, Coco and Kiefer stood side by side at the first-floor workbench, tidying up. Organizing magic pens, lining up ink pots, bundling scattered papers.
An ordinary time between teacher and student.
But—something was different.
*(The air has changed.)*
Neither teacher and student, nor secret lovers. The feeling of facing the same task together from now on—as equal partners. It was ticklish, and it made her happy.
Coco placed the map fragment she had received from Lucas beside the magic pen.
"Teacher, where is the Hidden Village of Vexler?"
Kiefer looked up. Adjusting his glasses with a finger, he gazed directly into Coco's eyes.
In those eyes—there was no longer any hesitation.
"Deep in the Elden Forest. There's a hidden valley that doesn't appear on any ordinary map."
Something hot raced through Coco's chest.
*(The next door—has opened.)*
Kiefer's past, the forbidden research, the hidden village. To the place where all of it connects—she could go there together with her teacher.
Outside the window, the town of Hasenval was bathed in the afternoon sunlight. Inside the atelier, the scent of magic pens and ink filled the air.
Beside Kiefer, Coco drew a small breath.
What awaited them from now on—she still didn't know. But she wasn't alone.
That alone was enough to keep the fear away.
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