Asia Argento was a girl in love.
The object of that love, however, was not Hyoudou Issei as people would normally assume in Kuoh Town, but Takashi Mitarai—the devil who had reached out his hand to her when everything else had already fallen apart.
Even so, the chances of that love being fulfilled were painfully slim.
Mitarai was a newbie reincarnated devil, a man whose reputation among devils was steadily growing. Unlike humans, devils were few in number and placed reproduction above all else; harems were not condemned—if anything, they were encouraged.
And yet, despite living as a devil, Mitarai still retained too much of his old human sensibilities. Though he never denied the concept of a harem, he couldn't fully picture himself surrounding his bed with women the way pureblood devils so naturally did.
Asia had met him not too long ago.
She had been assigned as a nun to a church in Kuoh Town, only to get hopelessly lost before ever reaching her destination. That was when Mitarai found her—smiling gently as he helped the lost foreign girl find her way.
What she didn't know then was that her assignment itself had been a trap. Fallen Angels had orchestrated the whole thing, targeting the Sacred Gear she carried—a relic gifted by a now-dead God.
Takashi Mitarai stormed the church alone to save the girl he had befriended.
He was so close.
Just one step too late.
Asia's short life came to an end there.
Yet even as her consciousness faded, she felt no bitterness. The boy she had come to trust had risked his life to save her. That alone made her life feel blessed. With that thought, she closed her eyes.
The one who cried out while holding her lifeless body was Mitarai. And the one who answered him was Rias Gremory—the King of their peerage.
By reincarnating Asia as a devil, Rias performed a pseudo-resurrection. And so, Asia and Mitarai were reunited once more.
A man who had charged alone into enemy territory just to save her.
Even if their genders had been reversed, it would have been impossible not to fall in love in that situation.
Asia's feelings bloomed naturally.
When she lamented having nowhere to live, Mitarai had smiled and told her she could stay at his place. Anyone would have assumed the two would become lovers within days.
Yet somehow, despite Asia being right there beside him, Mitarai chose Rias instead—and time simply passed that way.
Still, Asia refused to give up.
Just like back then—when she had lost her life—if she didn't give up, something might change.
That was what she believed.
And then she saw it.
Late at night, having realized she'd forgotten something in the Occult Research Club room, Asia quietly returned. From behind the door, she heard the sound of bodies colliding. Heart pounding, she slowly opened it.
Inside, Rias Gremory—their King and club president—was having sex with Mitarai.
Rias was on all fours like a bitch in heat, her crimson hair swaying as Mitarai covered her from behind. His cock was buried deep inside her, his hips driving forward with obscene force. The wet sounds of flesh slapping against flesh echoed in the room.
It was Asia's first time seeing real, raw sex.
She didn't scream.
She couldn't look away.
That hesitation sealed her fate.
Unlike reincarnated devils, Rias was a pureblood—and a high-class devil at that. Even while drowning in lust, sensing someone behind the door was effortless for her.
She knew exactly who was watching.
To Rias, who had already been considering how to offer Asia to Mitarai someday, this was nothing short of a gift falling into her lap. Even as she continued enjoying Mitarai's thrusts, she smiled inwardly, already planning to summon Asia later to "talk" about what she'd seen.
The next day at school, Rias spotted Asia walking down the hallway and casually called out to her.
"Asia, do you have a moment tonight?"
"E-eh!? Y-yes… um, what is it?"
"About last night."
Rias whispered softly into Asia's ear.
Asia's body jerked violently.
So she knew.
Asia panicked internally. She was terrible at hiding her emotions, and her reaction alone practically screamed guilt.
"Come to the clubroom tonight," Rias said before turning and walking away.
…
"Uu… So you really knew about yesterday…"
"Of course I did. I'm a high-class devil—and the next head of the Gremory family. I always keep my senses open."
"T-then… Why were you doing something like that with Mitarai-kun? Even if you're a devil, that's indecent! Don't you feel bad for Issei?"
"Hm… not anymore. My first love was him, that's true. But he thinks about naughty things all the time, no matter the situation. Though, to be fair, Takashi isn't exactly innocent either."
Asia froze.
The greatest wall standing before her—the woman she considered her ultimate rival—had already abandoned that relationship. And this wasn't because she was a reincarnated devil. The cold look in Rias's eyes when she spoke made that clear.
"B-but… he's always been like that. Isn't it a woman's role to accept that?"
"I don't deny it. Endurance can be admirable. But the reason I gave up on Issei was because of a rumor. You've heard about Takashi… Mitarai's rumor, haven't you?"
"Y-yes…"
Asia had heard it too—from a classmate named Kiryu. A girl with a libido almost as infamous as Hyoudou Issei's, though far less hated because she was female.
Asia didn't judge people by rumors. She found Kiryu lewd but friendly enough.
As for Mitarai Takashi, there was only one rumor.
That he was huge.
The origin traced back to a middle school trip, when classmates had seen him naked in the bath. The story spread, growing larger with time—right into high school.
Mitarai himself had brushed it off as nonsense.
Until Rias confirmed it firsthand—and became completely hooked.
Asia blushed just remembering the rumor.
"Compared to that, he's… normal," Rias continued. "For humans, that might be enough. But devils crave excellence by nature. If you slept with Issei even once, you'd feel unsatisfied. Before becoming a devil, you couldn't even talk about dirty things, could you?"
"…Now that you mention it… But I read that sex connects hearts. Didn't you connect with Issei-kun?"
"No, I didn't even sleep with him…"
"E-eh!? That's… that's for life, isn't it? Is it really okay to give away something so important?"
"Issei wouldn't care. The kind of girl he wants is lewd anyway~!! Think of Takashi as practice and have sex with him."
"Uu… I guess I never had a choice, did I…"
"If you'd refused, I might have used hypnosis. Just kidding. I'm not that cruel. Come to the clubroom late Friday night. I'll tell Takashi a girl wants to practice being naughty."
"Y-yes…"
As Asia left, muttering, 'Why did this happen?' Rias smiled wickedly.
"With this, my objective is complete. Fufu… Asia has fallen too. Another piece to add to Mitarai's Harem."
Still, it wasn't quite enough.
Maybe she should consult her mother.
Pulling Asia in was an unexpected delight. Rias had planned to recruit her eventually, but hadn't known how to handle someone so pure.
And at the center of all her thoughts was Mitarai Takashi.
As a lover—and as breeding stock—he was perfect. No matter how many times he came in a day, he was full again by morning. His libido was monstrous, and the fact that he still had self-control impressed her.
That was exactly why she wanted him.
For herself.
For the Gremory family.
And so, she began offering her peerage—step by step—binding them to him with desire and affection.
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