Lately, a certain question had been circulating among the members of the Occult Research Club.
Since a specific day, the relationship between the club president, Rias, and the vice-president, Akeno, had improved dramatically.
While they had originally been best friends and shared a bond of trust despite their King and Queen relationship, from the moment they arrived at the clubroom on Monday, it felt strangely more intimate.
A further point of curiosity was the new, heightened luster of their skin. When the club's smallest member, a first-year often called the academy's mascot, asked if they had eaten something delicious, they denied it, leaving the truth a mystery.
Today, as always, after finishing the club's activities—patrolling Kuoh Academy and their devil work—the members returned to their respective homes.
…
Within the confines of a park restroom, three individuals were crammed into a single stall, a place that should have been deserted in the depths of night.
"To call us to a place like this… how audacious. Ah, but I'm not angry. After all, both Akeno and I have been made your females. We wouldn't dare feel anger at a command from the male who owns us."
"That's right. Both Rias and I came because it was you, Sensei. Fufu, it's a strange feeling, isn't it? To be in a park restroom, a men's restroom no less, at a time when we'd usually be sleeping or working as devils."
Mitarai, who had claimed the excellent devils Rias Gremory and Akeno Himejima as his own, had summoned them to this place to firmly impress upon them the power dynamic between male and female.
Even the prideful Rias, who should have found this humiliating, had arrived looking pleased.
Akeno, for her part, had come driven by an instinctual understanding that she could not defy the younger boy she called 'Sensei.'
Though Akeno had not yet lost her virginity, since that day she had begun to exude a stronger, more feminine allure, increasing her popularity at the academy.
One reason was likely that Takashi had praised her inverted nipples, a longtime complex of hers. Embracing the idea that if her owner praised them, they were good, this new mindset began to show in her daily demeanor.
While she had previously made unconsciously seductive gestures towards men, she now ceased displaying them in front of any male but him.
Far from diminishing her charm, this, combined with the human tendency to desire what is hidden, only served to increase her appeal.
"So then? What did you call the two of us here for today?"
"Hmm, I hadn't decided anything specific… but first, I'd like you both to take your clothes off. I want to see your beautiful, naked bodies."
"Understood. Fufu, to think I'd be getting naked with Rias… the me from before would never have imagined it."
"That's true. I didn't even know you had that complex… but thanks to Takashi, our relationship has improved too, so it's all good."
That Saturday, Mitarai had taught Akeno a twisted etiquette for intimate relations. She later discovered online how strange it was, but if he desired it, she faithfully adhered to his teachings.
'When he presents his cock before you, remove your clothes and kneel in prostration.' Lately, she found herself becoming aroused by performing this ritual for him. She was steadily changing, bit by bit, to suit his preferences.
"So, how is it? I never thought I'd be stripping naked in such a place. But I'm confident in my body, and we've set up a barrier so no one will come, so look all you want."
"I feel the same. My heart and body are dedicated to Sensei. I no longer feel any shame. Since Sensei started touching me, both Rias and I have gone up a cup size~!!"
"…Fufu, I heard from Rias. They say men enjoy molding a woman themselves. You're like that too, aren't you, Sensei?"
Rias placed her hands on her hips and thrust out her chest, a posture that emphasized her voluptuous breasts and naturally drew the eye. The soft, quivering mounds were tipped with a beautiful pink, their large areolas proportionate to the impressive size of her breasts.
Yet they were not vulgar; their uniform shape was like that of an artwork. Her already erect nipples, promising a satisfying feel for the mouth, were on full display.
Akeno crossed her arms above her head, a pose that drew attention not just to her even larger breasts but to the exposed underarms it revealed.
A sheen of excited sweat already glistened there, its lewdness fully apparent even in the restroom's dim light. Whether she groomed it or not, no hair grew there, leaving only smooth, pristine skin.
They shone so enticingly they could almost be called another set of sexual organs. The tips of her monstrously-sized breasts—her nipples—remained hidden, a single horizontal line marking where they lay concealed.
Yet, no matter how many times he saw them, the bare skin of these two was breathtaking.
Their bodies radiated an intense, raw sexuality potent enough to awaken the desires of an uninitiated child. Every part of them was voluptuous, promising incredible pleasure to anyone who held them.
To embrace women of this caliber was to be enveloped in a fulfilling sense of satisfaction and the tangible, physical joy of their softness and sweet scent.
"You're both so fucking hot. So your bust sizes really got bigger, huh… hmmm."
"Whoa… you're making such a lewd face. A face so terrible you'd be utterly despised if anyone but us saw it. And look, Akeno, you're making just as lewd a face. What's wrong?"
"Fufu, I always thought I preferred to be the aggressive one. But seeing myself like this, I think I'm really more of the receptive type. You're the same, aren't you, Rias?"
"…Before you met Sensei, you were such a prideful girl, but now you're completely bound to him. Is it the weakness of being in love, or something else? I just find it fascinating."
"Well, I won't deny it. I used to take pride in just being a daughter of the Gremory house, but in front of him, even that title vanishes… It's like, how should I put it? I can finally just be my true self."
The sight of the two getting along so well had become familiar. While before their conversations seemed to revolve solely around club activities or devil matters, in front of Mitarai, they conversed with the easy familiarity of ordinary high school girls.
That night, when he had first interacted with Akeno, he had acted arrogantly and made her submit.
However, the real Mitarai was just a normal male high school student. Akeno was also aware that his way of speaking that time had been an act, because he had made her realize she was not an S, but an M woman.
And when faced with his penis, things like attitude and manner of speech became trivial. When shown the symbol of a male so overwhelmingly superior to herself, she naturally fell to her knees.
That was precisely why the gap made her heart flutter even more. The contrast between his usual self and the big equipment he possessed.
"Let's stop the breast appreciation here for now. Next, I'd like you two to show me your pussies. Come on, like I said before, get into a wide-legged stance and spread your pussies open yourselves."
"Of course. Please take a good, long look."
"...Yes."
Despite being in a place like this, they showed no concern as they lowered their panties. Perhaps due to their good upbringing, they neatly folded the removed panties and placed them inside a bag they had brought.
Even if it was by his command to strip, they couldn't bring themselves to place their clothes directly on the floor. Not that he would ask such a thing of them, of course.
They lowered their hips slightly, making sure he could see clearly as he sat on the toilet seat.
Spreading their legs wide, they parted their labia. Though not yet wet with love juices, Mitarai's gaze was riveted on their honeypots, which already exuded a distinctly female scent.
Rias's clitoris appeared to be the part she played with the most during masturbation, as it was somewhat enlarged. The hood was pulled back, revealing a pink, trembling clitoris.
In contrast, Akeno's clitoris was more modest and still covered by its hood. It seemed she didn't play with it much during self-pleasure. Instead, the folds of her labia were more misshapen than Rias's. Perhaps because she had yet to know a man, the pigmentation hadn't changed, and her pink mucous membranes quivered.
"Mmm, mmm. You both have such pretty pussies. As expected of a virgin, Akeno's is a deeper pink than Rias's. Well, that might change from now on, since it's going to be sucking on me."
"Please do with me as you like, Sensei. I am already yours, after all."
"Ahhh~! I'm glad I gave my virginity to Mitarai…"
"That's not fair~!! Sensei, won't you hurry up and take my hymen? Look, just thinking about it is making me wet."
"Taking it in a place like this is a bit... I'll take it another time. More importantly, there's something I want the two of you to do for me."
He ordered the two to kneel on the floor. He spread out the leisure sheet he had brought and had them kneel on it.
Their position naturally caused them to look up at him through their eyelashes. Their eyes were already glazed with lust, clearly anticipating what was to come.
"Today, I want you both to give me a titty fuck. Use those huge tits of yours to handle my dick and make me feel good."