The morning sun bled softly through the half-drawn curtains, and Kaito stirred in his sheets, the scent of last night still clinging to his skin—rose, sweat, and something darker.
He wasn't the same.
He knew it before he even opened his eyes.
[SYSTEM STATUS UPDATED]
Name: Kaito Aizawa
Lust Level: 1
Appearance Boost: Active (+10%)
Strength Boost: Active (+5%)
Trait: Desire Magnet — Girls within a 5-meter radius feel increased attraction toward you.
His phone buzzed.
A new message from Aoi.
—Come to my room. Now. Don't make me come get you.
His chest tightened. He'd slept with his stepsister. Aoi. Bold, cunning, beautiful Aoi. And now she wanted more?
He swallowed his nerves and stepped into the hallway, already noticing how the air felt thicker—charged. The house was silent. Parents out. It was just them.
Just like the system wanted.
He knocked.
"Come in."
Her voice was velvet.
Inside, the room was dim, curtains drawn, incense burning low. Aoi sat cross-legged on the bed, dressed in nothing but a sheer nightgown that clung to her curves like a lover.
"You came," she smirked. "Good boy."
He stood there, heart pounding. "What… do you want?"
"I want to test a theory," she said, licking her lips. "Last night… I felt something. Like you changed."
"I don't—"
She stood and walked toward him, eyes scanning his face, his chest, the new confidence he didn't even know he had.
"You're more handsome," she whispered, brushing his jawline. "And you're standing straighter. Taller."
"I don't know what's happening to me."
"Yes, you do," she said, wrapping her arms around his neck. "That system of yours. It's real, isn't it?"
He tensed. "You knew?"
"I felt it," she said, voice barely audible. "Like a spark… when we connected. Like I was being rewired."
He didn't answer. He couldn't.
Because her lips were already on his.
[Sin Opportunity Detected: Repeat Indulgence — Aoi Takamine]
Reward: Lust Trait Upgrade (Double Bonding) | Reflex Boost
Penalty: System Regression
[Y]
His hand moved without hesitation.
She moaned into his mouth as he pushed her back onto the bed, her legs parting for him like a ritual.
He pulled the nightgown off her slowly, savoring the view—her breasts full and soft, her skin flushed with heat. She tugged his shorts down with urgency, eyes burning.
"Show me how much you've grown," she breathed.
And he did.
—UNCENSORED EROTIC SCENE—
Their bodies tangled, limbs grasping, teeth grazing. She rode him this time, hips grinding in slow, powerful waves.
"Look at you," she panted. "Fucking your stepsister like you were born to."
He groaned, grabbing her waist, pushing deeper.
Her moans were louder today—desperate, raw.
He flipped her over, took her from behind, one hand tangled in her hair, the other gripping her hip. Her body quivered beneath him.
"You're addicted to me already," she gasped.
"Maybe I am," he growled.
Their climax hit like lightning—sharp, blinding. She collapsed beneath him, breathing ragged, skin glowing.
[Sin Achieved. Trait Upgraded.]
Double Bonding: Sexual partners are now spiritually linked. Bond deepens per encounter.
+1 Reflex. +10% Allure Aura.
Next Target: Randomized…
He lay beside her, breath heavy.
Aoi turned to him, smirking.
"That system… you're going to use it on others too, aren't you?"
He hesitated. "I don't know."
"You will," she whispered. "Because you're not the same anymore."
And she was right.
He wasn't.
He was becoming something else.
Something dangerous.
Something… unstoppable.