Emperor's harem: Transmigrated with SSS mana talent

Kael didn’t show it on his face, but inside, a curse rang through his thoughts.

Damn woman. 𝚏𝗿𝗲𝐞𝐰𝚎𝕓𝐧𝚘𝘃𝗲𝐥.𝐜𝚘𝕞

She wasn’t just intelligent—she was relentless.

Elara leaned back slightly and said, almost casually,

"Okay. I believe you’re not the Devil."

Kael didn’t react. He knew she didn’t believe it—not truly.

But that was fine.

As long as she wasn’t certain, he still had room to maneuver.

Still, he needed to clear his name—soon. His mind was already weaving possibilities, strategies, escape routes—

But Elara interrupted his thoughts.

"So, what’s your deal with the Devil, hmm?"

Kael looked at her calmly.

"I can’t tell you," he said flatly. "Betraying him would get me killed."

Then he added, voice level,

"But you can rest assured—the deal is done. I became the Duke. That was the price."

She narrowed her eyes.

"So you killed your family to take the title?"

Kael didn’t answer.

He only smiled.

Elara laughed—an amused, low sound.

"What an interesting fellow you are... I like it."

Kael’s gaze sharpened.

"And what do you want from the Devil, hmm?"

She went quiet for a moment.

Then spoke.

"I want his help."

"Help?" Kael echoed.

"Yes," she said softly.

"Something’s coming next month. Something big. And I want his help dealing with it."

Her eyes met his, steady and cold.

"So I want you to arrange a meeting with him. And I want you there, too—just to be sure."

A slow smile crept onto Kael’s lips, though his thoughts darkened.

Damn bitch. Playing smart again. So be it.

Out loud, he only said, "Fine."

Silence settled again. Heavy. Waiting.

Kael tilted his head slightly, his voice quiet but pointed.

"Then tell me... why did you propose a marriage alliance with me?"

Elara gave a soft laugh, brushing a strand of hair behind her ear.

"Don’t think too much about it," she said lightly.

"I just wanted to keep a close eye on you."

Kael slowly stood.

He took a step toward her.

Then another.

Elara’s smile faltered as he closed the distance—his presence suddenly overwhelming.

He stopped just in front of her. Their faces were barely apart.

"A close eye?" Kael murmured, his tone low and unreadable.

"How close are you planning to get?"

She inhaled sharply, caught off guard.

She tried to step back—

But Kael’s hand slipped behind her waist, drawing her in.

Now their noses were almost touching. His breath warmed her skin.

"If you get too close..." he whispered, voice calm, "I can be dangerous."

Her breath hitched.

Words danced at her lips but never formed. She could only look into his eyes, stunned, her cheeks tinged with red.

Then—just as suddenly—Kael stepped back.

He turned toward the door.

"I’ll inform you when the Devil contacts me," he said, his voice cool again.

And then he left.

Elara stood there, unmoving.

Flushed. Silent.

Her face unreadable.

But her heart... was racing.

###

Kael moved silently through the stone hallway, the echo of his footsteps the only sound accompanying him.

But his mind... was still trapped in the chamber with Elara.

Her words.

"Careful," came a quiet voice beside him—Yue, as usual, appearing from the shadows.

"If she gets any closer, we’ll have to start preparing a wedding feast."

Kael chuckled under his breath, the tension cracking for just a moment.

"She’s sharper than I thought," he murmured. "Too sharp."

Yue only smirked, then faded into silence again.

That’s when Kael noticed him.

Robin, dressed in formal robes, stood in the corridor ahead.

Waiting. Watching.

Kael’s smile returned—but this time, it was colder.

Finally. Time to collect what’s mine.

Robin gave a curt nod.

"Please follow me."

Kael stepped forward without hesitation, falling into step behind him.

Together, they moved deeper into the palace—toward the spell vault, the chamber where the royal family stored their highest-ranked magic.

The air grew heavier with every step.

Kael’s fingers twitched in anticipation.

He had earned this.

Kael soon saw it—a massive door at the end of the hallway, ancient and imposing. Runes shimmered faintly across its surface, pulsing with locked magic.

Robin stepped forward and placed his palm on the center sigil.

He began chanting.

The words were low and foreign, twisted in an old tongue Kael couldn’t recognize, let alone understand.

The door groaned in response. With a deep rumble, the locks clicked open one by one, until the stone doors slowly parted.

Kael stepped inside with Robin.

The vault was vast and quiet, lined with rows of enchanted cases and spell scrolls sealed behind crystal glass.

His eyes were immediately drawn upward—to a lone scroll encased at the highest point of the vault. A golden aura shimmered around it.

The Rank 6 spell.

"Why hasn’t the king learned that?" Kael asked, his voice barely above a whisper.

Robin didn’t look back.

"As you know... trying to master a high-rank spell without absolute control over your mana can lead to death," he said calmly.

"And His Majesty’s health isn’t what it used to be. He’s not fit for the risk."

He paused.

"More importantly... only the founding ancestor of the royal bloodline ever managed to master that spell. None of his descendants have been able to control it since."

Kael nodded slowly, thoughtful.

Power sealed by blood... and diluted by time.

Robin continued walking, and Kael followed.

They descended a short staircase and entered the Rank 3 section of the vault.

The air was thick here—not with dust, but with magic.

Each scroll vibrated faintly behind its barrier, like restrained power waiting—aching—to be unleashed.

Kael stepped forward, his eyes scanning the rows.

The vault was silent, but charged.

Across the chamber, Yue was already at work.

She moved with unnatural speed—eyes sharp, hands brushing faintly near each sealed scroll, calculating, deciphering, categorizing.

It was like watching a spirit of knowledge at play.

Kael exhaled slowly.

Of course I can’t steal them

He turned slightly, catching Robin’s eye.

Flashing a light, casual smile—the well-practiced expression of a noble young heir.

Robin nodded, his stance relaxed.

But Kael had already turned away again, his back now facing the butler.

And his smile changed.

This time, it wasn’t practiced. It wasn’t noble.

It was real.

The smile of a predator.

Well, Kael mused darkly, if I can’t steal them... someone else can.

Venom, he thought.