The first rays of the sun filtered through the curtains of Luna's room, but the light flowing within was not from the sun; it emanated from the aura of Rimuru's presence. Luna opened her eyes and for a moment thought she was still dreaming. She was trapped between two beings whose beauty challenged the laws of physics. Her head still rested on Rimuru's soft, warm chest, and a fragrance like the ocean mixed with unknown blossoms filled her lungs.
On the other side, Ciel, with her white hair spread like silk across the bed, was clung to Rimuru. Rimuru, with those golden eyes that seemed never to sleep, always watching eternity, smiled at Luna. Then, turning to Ciel who was slowly opening her eyes, without any preamble, Rimuru took Ciel's face in her hands and pressed a deep, lingering kiss to her lips—a kiss not of lust, but a confirmation of their primordial bond.
Luna, witnessing this scene, held her breath. She felt like a spectator to a sacred secret that no mortal should ever see. Rimuru, while still holding Ciel in her arms, turned her gaze toward Luna. Her golden eyes shimmered with mature mischief.
"Oh... are you awake, Luna?" Rimuru whispered seductively. "How is it? Do you want one of these too?"
Luna, her cheeks flushed a pomegranate red from embarrassment and ecstasy, bowed her head and said in a trembling voice, "I... I am not worthy of such a sacred touch, Rimuru-sama. Just being allowed to be near you is enough for my entire life."
Rimuru let out a short laugh that echoed in the room like silver bells. "Well, whatever you say, little girl. But remember, I am your owner, and I decide who is worthy of what."
Rimuru rose gracefully from the bed. Her physique in that silk nightgown was so flawless that Luna couldn't take her eyes off her. "Now, get up. We cannot go to meet those little devils on an empty stomach. I will prepare breakfast."
A while later, a scent filled the house that left Luna mesmerized. She went to the kitchen and saw Rimuru cooking with uncanny skill. The breakfast she had laid out bore no resemblance to ordinary meals; fruits that seemed plucked from paradise and breads baked with pure magic. During the meal, Ciel sat unabashedly in Rimuru's lap, and Rimuru, while stroking Ciel's hair with one hand, fed Luna small morsels with the other. With every bite, Luna felt a new power flowing through her veins. Rimuru said with a satisfying smile, "Eat, Luna... these foods are enriched with Null energy. Your body must be prepared to endure my aura throughout the day."
After breakfast, it was time to get ready. Rimuru looked at Luna and said, "We must adorn ourselves for today's theater." She took Luna to the bathroom. At Rimuru's command, the water changed its nature, becoming a stream of cleansing energy that washed away not only Luna's physical body but also her spiritual exhaustion. Rimuru herself patiently washed Luna's hair, making it shine brighter than ever with magic.
When it came to the clothing, Rimuru summoned the Kuoh Academy uniforms with a wave of her hand. But these were no longer the standard forms. With her mature and specific taste, Rimuru had altered them; the fabrics sat on Luna's body in a way that showcased her curves stunningly. Rimuru and Ciel also donned the school uniforms. On Rimuru's sculpted figure, with her golden eyes, the outfit created a paradox of "schoolgirl innocence" and "Outer God power." She tied her blue hair in a half-up style, giving her the appearance of a queen in a student's garb.
At the threshold of the house, Rimuru stood. She pulled on her black lace gloves and looked at Luna, who had become the most beautiful version of herself thanks to Rimuru's presence. Ciel stood beside them, cold and dignified, like an executioner in white.
Rimuru tilted Luna's chin up and said, "Today, you walk beside me. Do not fear; even if all of Heaven and Hell rise against you, I am behind you. Today is the day Kuoh Academy realizes that their kings and devils are merely plastic pawns in our hands."
Luna held her head high with a pride stemming from Rimuru. She was no longer that weak girl with a trash Gacha system. She was now the "Eye" of the Outer God. They set off—three dazzling beings who, with every step, gripped the ground of Kuoh under the tremor of their hidden power. Rimuru, with a mysterious smile, whispered, "Let us go and see how long this Rias Gremory can last against the Absolute Truth."
Walking into Kuoh Academy was like stepping into a puppet show. Thanks to the perfect veil Ciel had draped over them, none of the high-level devils or Sacred Gear holders could catch a scent of their earth-shaking divinity. To the outside world, they were just three exceptionally beautiful girls.
The introduction in class was simple yet impactful. Rimuru spoke with a mature and composed tone that even impressed the teacher. She acted as if she had lived in this lowly layer of reality for years. Ciel stood beside her with cold dignity and a gaze that seemed to analyze everything. Luna, however, held a different radiance; her beauty acted like a powerful magnet for the boys in the class.
During lessons, Rimuru stared out the window with total indifference. For a being to whom "Meta-Rimuru" had opened infinite paths, human mathematics and history were nothing but elementary amusements. Occasionally, under the desk, she would take Luna's hand and stroke her palm with her fingers, just to see her sudden blush and laugh inwardly at this small game.
When the final bell rang, Luna went to the rooftop for some air, unaware that a senior boy, enchanted by her beauty from the moment she arrived, was following her. As Luna stared at the horizon, lost in thoughts of Null powers and Rimuru's warm embrace, the boy called out with a trembling voice.
"Luna-san... please wait a moment!"
Luna turned and looked at the boy in surprise. The boy, holding a small, crumpled bouquet, stammered, "I... I haven't been able to take my eyes off you since you entered the courtyard. You are like an angel. Please... please go out with me!"
Luna was shocked for a moment. But in her mind, this boy and all beings in this world were nothing but worthless shadows compared to the glory of Rimuru. Luna replied with a firm but polite tone, just as Rimuru had taught her: "I am sorry, but my heart and being already belong to someone you cannot even imagine. I have no interest in this proposal."
As the boy left, broken-hearted, a heavy and fragrant presence filled the air. Rimuru, with Ciel smiling faintly beside her, stepped out from behind the rooftop structures. She had been there the whole time, watching with delight. Rimuru approached Luna with long, seductive strides. Her aura flared briefly, only for Luna, making her feel again what a strange being she stood before. Rimuru pinned Luna against the railing, placing her hands on either side of her, completely surrounding her.
"I heard what you said, Luna... 'my heart and being belong to someone you cannot even imagine'..." Rimuru said in a mature whisper, bringing her face close to Luna's. "I am very impressed. You are a loyal girl."
Luna, her breath hitching, trembled, "I... I only spoke the truth, Rimuru-sama."
Rimuru smirked, speaking with a tone of absolute possession, "It is good that you haven't forgotten. You are Mine. Not just your soul, but these lips, this body, and every beat of your heart."
Before Luna could respond, Rimuru claimed her lips in a deep, authoritative kiss. This was the taste of power, of the void, and of an Outer God that dissolved the boundaries between two beings. When Rimuru pulled back, Luna, with heavy eyes and a weak body, stammered, "Y-yes... I... I am completely yours."
Returning home, the apartment had become an interdimensional temple. Rimuru sat on the sofa with a dignity found only in powerful women. "Come here, Luna. It is time to fulfill the promise I made you on the way to school. You said you were weak, and I said my possessions must not remain weak. But power in my school is attained through simultaneous pain and pleasure."
Ciel isolated the room. Rimuru took Luna's hand and sat her on the floor between her legs. She tilted Luna's head back so her eyes drowned in Rimuru's molten gold gaze. "Your first lesson is the acceptance of the 'Void.' You must learn to empty your existence of all you were, so I can fill it with Null power."
Suddenly, Rimuru leaned down and drowned Luna in a long, fiery kiss. This time, it wasn't calm; Luna felt a stream of energy, both cold and burning, pouring from Rimuru's lips into her throat. This energy shook every cell of her human body. As the structural change reached its peak, Rimuru kissed her again—the second kiss acting like a magical sedative. Rimuru tasted the fear from Luna's lips while injecting the codes of Null power into her soul.
Hours passed in that time bubble. Rimuru kissed Luna several times throughout this "game"; kisses that broke layers of her human limitations. Once on the forehead for insight, once on the neck for verbal possession, and many times on the lips for the merging of wills. In the end, Luna's eyes held flecks of molten gold, similar to Rimuru's.
Luna, now feeling a massive power, knelt and kissed Rimuru's feet. "I... I feel I could turn this entire city to nothingness with a single gesture. Thank you, my Goddess."
Rimuru raised her and placed one last soft, possessive kiss on her lips. "Remember Luna, this power is from me and for me. I can take it back whenever I wish. But for now... go and rest."
That night, as Luna slept between Rimuru and Ciel, she saw herself standing over the ruins of Kuoh Academy. Rimuru whispered to Ciel in the dawn, "Meta-Rimuru really knew how to entertain me... this girl, Luna, is going to show the true face of horror to this world tomorrow."