As an Incubus, there were things Shiraishi Asa had to start attempting.
And the Yotsuya Miko sitting before him was a perfect candidate.
She had a gentle soul, an innocent heart, and above all, a connection of trust already formed between them.
Most importantly, they each had something the other needed.
His racial memory as an incubus told him—humans could reap tremendous benefits through sex with an incubus .
It was not just about strengthening the body.
Sometimes, they could even awaken special powers, abilities borrowed from the incubus's innate potential.
It was precisely because of this trait that incubus were hunted, enslaved, and driven to near extinction.
But Asa knew—
Miko would never betray him.
He wanted to test something: could the powers granted by his system also be passed on through sex?
On the bed, Yotsuya Miko sat stiffly, feeling the air around them grow thicker, heavier, almost electrified.
"Sex....?"
Her pretty face flushed to the tips of her ears.
Unbidden images, wildly inappropriate for children, flashed in her mind.
"You're still so young... where are you learning about this?" she stammered.
But Asa didn't answer.
Instead, he moved closer, pressing her gently back onto the bed.
His voice whispered against her skin.
"Sister Miko... I am no human— but an incubus."
Her eyes widened in shock.
Before she could react fully, he leaned down—
And pressed on his lips on her mouth.
Her mind blanked instantly.
Soft.
Warm.
Her body tensed, instinctively, but she didn't resist.
And then she felt it.
A strange, thrilling sensation coursing through her veins.
Asa moved like an inborn expert, channeling the true power of his race.
The ability known only to an incubus.
...
Meanwhile.
In the kitchen, Yotsuya Toruko continued chopping vegetables, but her hands were slow, distracted.
From the living room, she thought she heard faint sounds from Miko's room.
Suspicious sounds.
"...No. No! I must be imagining it!"
Toruko shook her head violently.
She was being overly sensitive.
Ever since that accident in the bathroom earlier, her mind had been flooded with wild, inappropriate thoughts.
She glanced toward her daughter's door.
She must not let her imagination run away again.
"I'll just pop out quickly for soy sauce," she muttered.
"And maybe some seafood. We should treat Asa properly tonight."
Toruko grabbed her bag and hurried out.
...
An hour later.
Toruko returned with bags of groceries and called out cheerily:
"Miko, Asa! Dinner is ready!"
There was a long pause.
More than ten seconds.
Finally, Miko's voice floated back weakly.
"Coming!"
A few minutes later, Toruko sat at the table, glancing curiously at her daughter.
Miko's face was slightly flushed.
And—she had changed clothes?
"Huh? Why'd you change again?"
Miko fumbled, embarrassed.
"Uh... my clothes got a little dirty."
Toruko blinked.
"I washed that outfit yesterday."
But before she could press further, she noticed something else.
Miko looked different.
Her skin glowed faintly.
Her demeanor had changed.
More composed.
More... grown-up.
"Maybe I'm imagining things," Toruko thought.
She sighed softly.
"You really have grown up, Miko."
Throughout dinner, Miko was unusually sweet, picking food for her mother and chatting lightly.
Afterward, Asa stood up politely.
"Thank you for the meal."
Toruko reached out and ruffled his hair affectionately.
"You're welcome anytime, Asa."
Asa turned to glance at Miko, who blushed deeply under his gaze.
"I'll definitely come visit often," he promised seriously.
Before leaving, he discreetly triggered his system.
[Ding! Successfully signed in at Yotsuya Residence!
Rewards:
[LV1. ###]
[LV1. Mind Modification]
Additionally:
### has automatically upgraded to LV2!
Asa's eyes gleamed.
Checking the system window, he reviewed the new abilities.
LV2. ###: Create sudden gusts from the ground, easily blowing up skirts. (Area increased!)
LV1. Mind Modification: By locking eyes for three seconds, implant or alter common sense and thinking. Cooldown: 30 seconds.
Powerful tools.
And that wasn't all.
Tonight's sex with Miko had been a massive success.
The Yin energy he absorbed was equivalent to what he would gain from an entire year of moonbathing.
His body felt light, strong—twice as powerful as before.
More importantly—
Through careful guidance, he had helped Yotsuya Miko awaken her latent ability.
Though still rough, her telekinesis had reached LV0.
Small.
But it was a start.
Even better, Asa's own telekinesis ability had leveled up:
LV2. Telekinetic Exorcise: Exorcise evil spirits without regard to strength, within a 10 cubic centimeter range.
Asa grinned inwardly.
Succubi truly were monsters.
Each sex session meant immense growth.
Both for himself and for his partner.
He couldn't wait to keep advancing.
And Miko...
He was sure she would understand soon enough.
"I'll take Asa to the station!" Miko called out suddenly.
"Be careful," Toruko replied warmly.
Hand-in-hand, the girl and the little boy walked toward the train station under the evening sky.
Toruko watched them go.
Her smile faded slightly.
She noticed—
Miko's gait was awkward.
Her legs stiff, steps uncertain.
"...Did she sprain her ankle earlier?"
Toruko sighed again.
Teenagers were so clumsy.
...
On the path to the station.
Miko held Asa's hand tightly.
In the soft glow of the streetlights, they looked like a pair of siblings.
But their conversation was anything but ordinary.
"You have to be careful when using telekinesis," Asa instructed.
"It drains a lot of energy."
"And you must control the distance properly. Wasting too much energy will only weaken you."
"...Understood."
Miko nodded obediently.
Her heart still fluttered from earlier.
Everything had happened so fast.
She hadn't even fully processed it yet.
More than Asa's revelation as a incubus—
More than the sudden awakening of her power—
It was that lingering sensation inside her body.
That faint, addictive warmth she couldn't forget.
It left her shy, confused.
And a little guilty.
After all, Asa was still just a child.
But Asa, sensing her turmoil, leaned closer.
"Sister Miko," he said gently.
"I already told you. I'm an adult."
"You saw it yourself."
Miko's cheeks burned.
She had seen it.
And it was... very convincing.
Besides—
She needed his help to strengthen her ability.
Yes.
This was all for the sake of killing those ghosts.
For protecting herself.
For survival.
Straightening her back, Miko nodded, determination flashing in her eyes.
"All for the sake of growth!"
Asa smiled faintly beside her.
Tonight was only the beginning.
Their journey together had just begun.
***
As I said before, no smut have been written in this chaps — ion wanna hear no complains. 😉