Lucas sat alone in the living room after Henry left, the folder on Professor Ava Whitlock still open on the low table. He scanned the final pages once more, committing the key details to memory, then closed it with a soft snap.
He stood up, stretching his shoulders, and made his way toward Yuna's assigned room. The encounter with Valentina had left a restless heat in his body, and the interrupted moment with Yuna earlier only made it worse. He wanted to finish what they had started.
He knocked on her door.
No answer.
He knocked again, a little harder.
Still nothing.
Lucas clicked his tongue in irritation. "Yuna."
Silence.
Ah shit… I almost had her, he thought, frustration building. If not for that guy Henry showing up, I would have finally gotten some action. I'm already drained as it is… these two days of teasing from Sophia and that crazy bitch Valentina have me restless.
He turned away from the door and headed toward his private training room, the large space equipped with reinforced walls, weapon racks, and mana-dampening fields.
But isn't Yuna coming on too strong? He mused, picking up a training sword and giving it a few practice swings to loosen his muscles. I thought I'd need at least some lovey-dovey moments before she willingly came to me, but she practically jumped on me. Is it really just because of her bloodline amplifying her desires? If she becomes lustful for anyone, do I have to kill her…
He paused mid-swing, the thought lingering.
Wait… isn't that exactly what I expected from her?
Lucas called out softly into the shadows.
"Imp."
The small shadow entity blurred out from the corner of the room and knelt immediately, silver eyes glowing.
"You called me, Master."
Lucas continued swinging the sword in slow, controlled arcs, warming up his body.
"Tell me, Imp… did you manipulate anything just now?"
The Imp lifted its head, silver eyes brightening.
"I did amplify her fears, Master. That succubus fears losing you, and since she is bound to you, it was easy for me to reach her mind…"
Lucas nodded, his swings growing sharper and faster.
The Imp shivered lightly. "Did I make a mistake, my Master…?"
Lucas stopped swinging and turned toward the small creature, his expression calm but firm.
"No. It's not about you." He exhaled slowly. "From now on, don't try to manipulate her thoughts. I want her to serve me willingly… and it's more fun that way."
The Imp bowed deeply, understanding the order.
"As you wish, Master."
Lucas reached into his storage ring and pulled out a simple Skill scroll he had received as a reward earlier. The surface pulsed faintly with shadow energy, almost alive.
"Shadow Step," he murmured. "Low tier, but it should be compatible with my class."
He hadn't had much time to train it properly the previous day, but now, in the quiet of his personal space, he had the opportunity.
Lucas unfurled the scroll. The moment the Scroll paper opened, dark runes lifted off the surface like living smoke, swirling around him in a slow, hypnotic dance.
A cold, tingling sensation spread through his body as the knowledge of the skill was imprinted directly into his mind and mana core.
The scroll burned to ashes in his hands, the last embers fading into nothingness.
[Skill Acquired: Shadow Step (Low Tier)]
- Instant short-range teleport between shadows within line of sight.
- Leaves a faint afterimage for a brief moment to confuse enemies.
- Mana cost: Low.
- Cooldown: Minimal at current rank.
Lucas opened his eyes, a small, satisfied smile forming on his lips.
"Not bad for a low-tier skill," he thought. " Thought it doesn't fit quite well with my fighting style, a good Movement skill nonetheless.
He tested it immediately. He stepped into a shadow cast by a training dummy and vanished, reappearing instantly in another shadow across the room. The movement was smooth, almost instinctive, as if the shadow itself had carried him.
Lucas stood in the center of his private training room, sweat already dripping down his bare chest and back.
He had been practicing the newly acquired Shadow Step skill for nearly an hour, pushing his body to its current limits. Each teleport between shadows felt smoother than the last, but the mana drain and physical toll were still noticeable at his low rank.
He stopped, breathing heavily, and wiped the sweat from his forehead with the back of his hand. The skill was useful — quick, unpredictable, and perfectly suited for his fighting style once he combined it with his class abilities. But it was still only a low-tier skill. He needed more.
His eyes moved to the storage ring on his finger. He pulled out the ancient scroll he had won at the auction earlier that day — the Unknown Secret Art.
The moment he unfurled the scroll, a system window opened in front of him, glowing with dark, shifting runes.
[Secret Art Acquired: Umbral War Doctrine]
"Light shows you where to strike. Shadow lets you strike where you shouldn't exist."
Because of his Perfect Compatibility, the system revealed the full structure of the art to him — far more information than most people would ever see at this stage.
Lucas read through the details in silence. It was a pure combat-type art focused on high-speed assassination, perception manipulation, stealth, afterimages, shadow clones, and rapid, unpredictable strikes. Everything an assassin or ghost-type fighter would dream of.
His expression slowly turned sour.
"Ah, shit…" he muttered, running a hand through his sweat-damp hair. "Isn't this a complete art for an assassin? For a longsword user like me, it's practically screaming inefficiency."
He had perfect compatibility because his Abyssal element naturally included shadow and darkness as sub-branches, but it still felt wasted on his preferred fighting style. He was a dominator, not a shadow dancer. Mastering this would take significant time and effort, and he already had too many things demanding his attention.
Lucas stared at the scroll in his hand, his mind working quickly.
It's not like I lose anything by giving it away… If Yuna becomes stronger, it's all better for me.
A low chuckle escaped his lips.
He shook his head, the decision made. He would pass the Secret Art to Yuna. With her succubus bloodline and growing loyalty, she was the perfect recipient.
Feeling satisfied with the choice, Lucas stored the scroll back in his ring. He left the training room, stripped off his sweat-soaked clothes, took a quick shower, and collapsed onto the bed.
As sleep began to pull him under, one final thought crossed his mind.
Tomorrow… things are going to get interesting.
***
Yuna woke up slowly, the soft morning light filtering through the curtains of her private room. The moment she shifted under the sheets, she felt it — the uncomfortable dampness between her thighs. Her eyes snapped open as she glanced down at her soaked panties, the fabric clinging to her skin.
Her face flushed bright red with embarrassment and disbelief.
"What the hell is happening to me…?" she whispered, voice shaky.
She quickly stripped the bed sheets, bundling them up and rushing to the washroom. Standing naked in front of the huge full-length mirror, Yuna stared at her reflection.
The succubus bloodline had transformed her completely. Her once slightly chubby waist was now slim and toned, curving beautifully into wide, enticing hips. Her breasts had become massive and full, heavy yet perfectly shaped, sitting high on her chest with a natural bounce.
Her ass was round, firm, and prominent, the kind that drew the eye no matter how hard she tried to hide it. Her legs had lengthened and filled out into long, thick, juicy thighs that looked both powerful and incredibly seductive. Her black hair had grown longer, reaching down to her waist in silky waves, framing her face and accentuating her rose-pink eyes that now held a permanent sultry glow.
Even Yuna herself couldn't stop staring. She looked… breathtaking. Dangerous. Like a walking temptation.
She ran her hands down her body, feeling the new softness and firmness. A small, conflicted moan escaped her lips.
How casually Lucas changed my entire life… she thought, a mix of gratitude and unease swirling inside her. I struggled for 18 years just to survive… and in three days, he turned me into this.
As she stepped into the shower, hot water cascading over her new curves, her mind drifted back to yesterday.
The moment she had smelled that unfamiliar feminine scent on Lucas, something primal had snapped inside her. It felt like her territory had been invaded, like someone had dared to touch what belonged to her.
She didn't fully understand why she felt so possessive after knowing him for only three days, but the feeling was undeniable. Lucas didn't crave affection like others. He didn't sulk or complain about his life. He either took what he wanted… or destroyed whatever stood in his way.
And when he had challenged her — "Mark me" — her body had moved on its own. She could still feel the heat of his possessive touch, the way his voice had rumbled, "You're mine." Strangely, those words had made her feel… safe. Desired. Owned.
She soaked in the water for a long time, trying to calm the confusing mix of embarrassment and lingering arousal.
After drying off and dressing in her academy uniform, Yuna made her way to the main hall. The place was quiet. No sign of Lucas anywhere.
As she stood there wondering where he had gone, the AI system chimed softly.
"Good morning, Miss Yuna. Master Lucas left early for the day. He asked me to tell you to meet him at class. He also left a present for you on the table."
Yuna's expression softened into a small, warm smile. He left early so it wouldn't be awkward for me…
She walked to the dining table. There, resting neatly in the center, was an ancient-looking scroll sealed in a glowing crystal case. The dark energy pulsing from it was unmistakable.
Yuna's eyes widened as she picked it up. The system window immediately appeared before her.
[Secret Art: Umbral War Doctrine]
Her breath caught in her throat. She recognized the power radiating from the scroll instantly — this wasn't some ordinary skill. It was a complete, self-contained Secret Art. A rare inheritance technique that most people would kill to obtain.
Tears welled up in her eyes, not from sadness, but from overwhelming emotion.
He… gave this to me?
She clutched the scroll tightly to her chest, her heart pounding. The man who had changed her entire existence in just three days had now given her something so valuable without asking for anything in return.
Yuna's lips trembled as she whispered to the empty room, voice thick with gratitude and something deeper.
"Thank you… Master."
She hugged the scroll closer, her succubus instincts humming with loyalty and affection.