The Kamiyo household was lively as Tenra and his girls welcomed Rias, Akeno, and Koneko into their new home.
"Tenra, we're finally together again," Akeno sighed, clinging to his arm with a look that was equal parts nostalgia and happiness.
"I missed this so much… Let's never be apart again."
Rias watched the scene with a faint, jealous smile. "Akeno, is being back with Tenra really that wonderful? I'm sorry for keeping you away for so long."
Akeno's eyes sparkled mischievously. "Ara ara, so Rias finally understands? If I hadn't felt sorry for a certain someone's lonely face after I left, I would've come back to Tenra ages ago."
Rias's eye twitched; she bit her lip, frustration bubbling up. Akeno really knew how to push her buttons.
"Alright, you two—everyone's watching. Aren't you embarrassed?" Tenra tapped Akeno's head, feigning exasperation.
Despite their constant bickering, the two cared deeply for each other. Yubelluna and the other girls stifled laughter behind polite hands, leaving Rias and Akeno blushing and silent.
Rias cleared her throat, regaining her composure. "Well, that's settled. Per my brother's orders, we'll be living here from now on."
"Please take care of us," Akeno and Koneko echoed, bowing in unison.
"Don't be so formal, Rias-sama!" Yubelluna replied, while Aisha bounced forward, "Rias-nee, Akeno-nee, Koneko-chan, welcome!"
Rooms had already been prepared, and with everyone's help, the newcomers quickly settled in. Rias, noble and beautiful, was Tenra's fiancée—the future mistress of the house. The girls treated her with respect, but Rias herself was warm and approachable, earning genuine affection in return.
Akeno's playful nature made her instantly popular, and she slipped seamlessly into the group. As for Koneko, fellow nekomata Ni and Li, along with Mira, Iru, and Neru—old comrades from past battles—gathered around her, showering her with attention. Koneko blushed furiously, overwhelmed by the warmth, her shy reactions sparking laughter throughout the room.
Seeing everyone getting along so well, Tenra smiled. Then, remembering something, he turned to Rias. "Rias, come with me for a moment."
Curious, Rias followed him down the hall, the other girls exchanging knowing glances as the two disappeared into Tenra's room.
Inside, Rias glanced around. "What is it, Tenra?"
"Nothing complicated," Tenra said, a mysterious smile playing at his lips. "I just want to give you a gift."
Rias's eyes brightened. As a princess of the Gremory family, she lacked for nothing—but if Tenra was offering her something, she couldn't help but feel a flutter of excitement.
Under her gaze, a crimson jewel shimmered into existence in Tenra's hand.
"What's that?"
"The Longinus—Boosted Gear," Tenra answered.
Rias stared in disbelief. The legendary Sacred Gear, the Red Dragon Emperor's gauntlet—was Tenra really giving this to her? Shock rippled across her face.
"You… you mean this is my gift?"
Tenra nodded. "That's right. Don't you like it?"
He reached out, gently stroking her vivid red hair.
"No, I mean—this is too precious!" Rias protested, her voice trembling with emotion. "I can't accept something so valuable…"
Tenra chuckled softly. "Relax. I'm not giving it away—I'm sharing its power with you."
Seeing her flustered, moved expression, Tenra explained: with his abilities, he could share the power of a Sacred Gear with another host.
Rias listened, stunned. "You can do that?! So you can not only steal Sacred Gears, but share their abilities too? Just how overpowered are you?"
Tenra smiled. "So, Rias—can you accept it now?"
He touched her cheek, his gaze gentle.
Rias steadied herself, searching his face. "Why are you doing this?"
"Isn't it obvious?" Tenra replied. "You're my fiancée. Giving you gifts is the least I can do."
He paused, then added, "And you're talented—if we develop the Sacred Gear's abilities together, it'll help me too."
Sharing Boosted Gear with Rias wasn't a whim. Tenra had planned it for a while. Rias's talent was undeniable, and she'd inherited destructive magic from her mother, Venelana—her compatibility with the Red Dragon Emperor's power was exceptional. Sharing Boosted Gear would dramatically increase her strength, and Tenra would benefit as well.
Rias took a deep breath, her eyes fierce. "I understand. But if you give me this power, I'll reignite my determination to defeat you!"
She spoke with solemn pride. Their engagement was official, but Rias hadn't forgotten her old promise: once she gathered her own servants, she'd challenge Tenra in a Rating Game—and win.
She knew she wasn't his match, knew there was no real reason to fight anymore. But she refused to be a mere ornament, hiding behind her fiancé's strength. She wanted to prove herself—to Tenra, and to everyone.
That was Rias Gremory's pride.
Tenra lifted her chin, smiling fearlessly. "Rias, you know what I love most? That beautiful, proud spirit of yours."
"Go on—accept its power. Become more beautiful, more proud, stronger, more dazzling."
"And then… come defeat me."
Without hesitation, Tenra pressed the crimson jewel to Rias's chest, letting its power seep into her body.
"Ah…"
Rias's hair fanned out as pain flickered across her face, a terrifying aura exploding from within her.
Destructive. Wild. As if she could obliterate the world.
Tenra activated his barrier, shielding them both. He watched, eyes gleaming, as Rias's power soared. Her compatibility with the Red Dragon Emperor was extraordinary—maybe, just maybe, she was the most suitable host this Sacred Gear had ever known.
Finally, the fusion was complete. Rias's aura settled.
She gasped for breath, sweat glistening on her skin. Even though Tenra had tried to be gentle, the Longinus's power was overwhelming—she'd endured agony beyond words.
But she'd survived.
Rias clenched her fists, disbelief and awe mingling in her eyes.
No mistake—this power was real.
As one of the Underworld's strongest new-generation devils, Rias had always possessed High-Class strength, sometimes even approaching Ultimate-Class when she pushed herself.
But now, with the Red Dragon Emperor's power shared, she had crossed the threshold—she was an Ultimate-Class Devil.
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