Dimensional Rift - Yu-Gi-Oh！&Vocaloid

💜💗💜💗💜 Story 💗💜💗💜💗 Deep within another dimension, far removed from the human world, stood a magnificent black dragon castle. Lifelike dragon sculptures adorned its pitch-black walls, while crimson flames illuminated the corridors. In the throne room at the very heart of the castle lived the awe-inspiring incarnation of the Red-Eyes Black Dragon—レイン. She possessed long, silky black hair that shimmered with deep crimson highlights. Her brilliant red eyes seemed capable of seeing through any lie. The dragon horns upon her head, the enormous black-and-red wings extending from her back, and her exquisitely crafted black armor all reflected the dignity and majesty of a dragon queen. However, today, an extraordinarily unusual scene was unfolding in her throne room. "Hey! レイン! How much longer are you going to make me wear this ridiculous outfit?!" A blond young man was lying across her lap. He was none other than 城之内克也. However, instead of wearing his usual duelist attire and displaying his characteristic confidence, 城之内 was currently dressed in a cream-colored puppy costume. The fluffy hood had two floppy dog ears, and there was even a tiny tail attached to the back. "Hehe... What's wrong with it?" レイン sat lazily upon her throne, gently stroking his golden hair. "I think you look adorable, 克也." "A-Adorable?! I'm a duelist! I'm not your pet dog!" "But who was it that promised to do anything I asked if he lost yesterday's duel?" "Ugh...!" 城之内 immediately fell silent. Yesterday, he had confidently challenged レイン to a duel, only to lose because he miscalculated the effect of his final card. As a result, he had been forced to wear the puppy costume レイン had specially prepared for him. "Besides..." レイン leaned forward slightly, a gentle smile appearing in her crimson eyes. "You're my beloved boyfriend. Even dressed like this, you're still the person I love most." "W-What?!" 城之内's entire face turned bright red. "D-Don't just say embarrassing things like that out of nowhere!" レイン laughed happily. She gently caressed his cheek. Although he continued complaining, he made no attempt to leave her lap. For a queen who had once protected the Black Dragon Kingdom all by herself, 城之内 was the one person who could make her set aside her royal dignity and smile from the bottom of her heart. However, just as the two were enjoying their rare moment of peace— BOOOOOOM! The entire throne room suddenly shook violently. A dazzling blue light tore open the air in the center of the hall! "What the heck?!" 城之内 abruptly raised his head, causing the floppy ears on his puppy hood to bounce. レイン's expression instantly became serious. She spread her enormous dragon wings, her crimson pupils glowing with vigilance. "Spatial magic? No... This power doesn't belong to our world." The blue rift gradually expanded. Then, two figures suddenly tumbled out of the light. "Watch out, ルカ!" A handsome man with long, pure-purple hair extending to his waist quickly reached out and pulled the pink-haired woman beside him into his arms. "Ah!" The two stumbled several steps before finally regaining their balance. The blue portal disappeared behind them. Silence returned to the throne room. The four stared at one another. "..." "..." 城之内 was the first to break the silence. "Hey, hey, hey! Where the heck did you two come from?!" ## Chapter 2: Visitors from the World of Music "Where... are we?" The pink-haired woman slowly raised her head. She possessed beautiful, clear blue eyes and wore an elegant black-and-gold outfit. She was 巡音ルカ. Standing beside her was 神威がくぽ. He had violet eyes, a handsome masculine face, and long, straight purple hair. Two distinctive locks of hair grew in front of his ears and flowed naturally down to his waist. "ルカ, are you hurt?" "No, I'm fine. Thank you, がくぽ." がくぽ breathed a sigh of relief. He then looked around. Towering stone pillars, enormous black dragon statues, burning braziers, and a woman with dragon horns and wings sitting upon a throne. "This doesn't seem to be our world." ルカ had also noticed the two people on the throne. "Um... がくぽ?" "What is it?" "Look over there..." She pointed toward 城之内. "Why is that blond man wearing a puppy costume and lying across that dragon lady's lap?" "..." がくぽ remained silent for three seconds. Then he answered with an extremely serious expression. "Perhaps... it's a special royal custom in this world?" "OF COURSE IT ISN'T!!" 城之内's face turned completely red. "I'm not some royal pet!" "Pfft...!" ルカ couldn't hold back her laughter. "S-Sorry..." "You're obviously laughing at me!" レイン, meanwhile, smiled in amusement. "Hehe. What interesting visitors." She rose from her throne and gently helped 城之内 to his feet beside her. "Welcome to the Black Dragon Castle. My name is レイン, and I am the incarnation of the Red-Eyes Black Dragon." "The Red-Eyes Black Dragon?!" Before 城之内 could say anything, がくぽ asked in surprise: "Do you mean the legendary dragon possessing pitch-black scales and crimson eyes?" "Precisely." レイン spread her wings slightly. A tremendous aura of draconic power instantly filled the throne room. However, ルカ showed no fear. Instead, she smiled warmly. "Your wings are beautiful." "...!" レイン was momentarily stunned. In the past, most people who met her for the first time had been terrified by her overwhelming draconic power. Very few had ever complimented her so naturally. "Thank you." Her voice softened. "Now then, who might you two be?" "My name is 神威がくぽ, and this is 巡音ルカ." がくぽ bowed politely. "We come from a world where music possesses extraordinary power." "Music?" 城之内 tilted his head curiously. "You mean, like singing and stuff?" "Exactly." ルカ smiled. "We were practicing a new song when a strange light suddenly appeared. Before we knew what was happening, we were pulled into it." Hearing this, レイン's expression gradually became serious. "I see..." She looked toward the spot where the portal had disappeared. "It seems the barriers separating the dimensions are beginning to weaken." ## Chapter 3: Black Dragon Flames and the Bonds of Love At that very moment, a deafening roar echoed from outside the castle. ROOOOOAR! The throne room's windows shook violently. A cloud of pitch-black mist seeped through the ceiling, gradually forming the silhouette of a gigantic monster. "This is bad!" レイン immediately spread her wings, shielding everyone behind her. "It's a Shadow Beast attracted by the dimensional rift!" The monster opened its enormous jaws and lunged toward them. "ルカ, get back!" がくぽ immediately stepped in front of her. However, 城之内 had already charged forward. "Hey, you ugly monster! Nobody gave you permission to barge into my girlfriend's castle!" Even though he was still wearing his ridiculous puppy costume, his eyes were filled with courage. Watching him, レイン couldn't help smiling. "Honestly... Even when you're dressed so adorably, you never know when to back down." She extended her right hand. Crimson flames instantly enveloped her armored gauntlet. "克也, come back to me!" "Got it!" 城之内 quickly returned to her side. レイン spread her enormous black-and-red wings. "Flames of the Red-Eyes!" BOOOOOOM! A torrent of crimson dragon fire swept across the throne room. The Shadow Beast screamed in agony, but it did not disappear. "Impossible!" レイン frowned. "It's absorbing my flames?!" "レイン!" 城之内 reached out and grasped her hand. "You're not alone!" He gazed into her eyes with complete sincerity. "No matter what kind of enemy we're facing, I'll always be right here with you!" レイン's crimson eyes widened slightly. "克也..." As their gazes met, another voice rang out. "If this creature was born from dimensional instability..." がくぽ turned toward ルカ. "Perhaps music can restore the balance between the worlds." ルカ nodded. "Let's try it together!" The two held each other's hands tightly. A beautiful melody began echoing through the throne room. がくぽ's deep, gentle masculine voice intertwined with ルカ's clear, soothing singing, creating a breathtaking harmony. Musical notes transformed into violet and pink particles of light, circling around レイン. Her dragon flames gradually grew brighter and purer. "This power...!" レイン felt the emotions carried within their song. It was more than magic. It was the bond between two people who trusted and protected one another. She turned toward 城之内. He gave her his familiar, confident grin. "Go get 'em, レイン!" レイン smiled and nodded. "Right!" Spreading her wings to their fullest extent, she concentrated every last spark of dragon fire into her palms. "RED-EYES—BLACK FLAME BURST!" BOOOOOOOOM! The crimson dragon flames intertwined with the violet and pink light of the music, forming a tremendous wave of radiant energy. The Shadow Beast was finally consumed by the brilliant light and vanished. Peace returned to the throne room. ## Chapter 4: A Promise Between Two Couples After the battle, レイン invited がくぽ and ルカ to stay at the castle as her guests. An elegant banquet table was covered with exquisite desserts, fragrant tea, and delicacies from another world. "I never imagined music could possess such extraordinary power." レイン lifted her teacup, smiling appreciatively. "We truly have you two to thank for today." "No, we're the ones who should be thanking you." ルカ smiled warmly. "If you hadn't protected us, we might have been seriously injured." がくぽ nodded in agreement. "Besides, the bond between you and 城之内 is truly moving." "Hehe! Well, of course!" 城之内 proudly puffed out his chest. "レイン and I are the ultimate team!" "And lovers too, right?" ルカ added with a playful smile. "Ugh!" 城之内 blushed again. However, レイン showed no embarrassment whatsoever as she wrapped her arms around his. "That's right." She smiled and leaned closer to him. "克也 is my beloved boyfriend, and the most precious treasure in my life." "レ-レイン!" "What? Don't you like hearing that?" "I-I never said that!" 城之内 turned away, but secretly tightened his grip on her hand. Watching them, ルカ smiled tenderly. She gently leaned against がくぽ. "They really are happy together, aren't they?" "Yes." がくぽ held her hand. "Just like us." A faint blush appeared on ルカ's cheeks. "がくぽ..." Not long afterward, レイン finally managed to reopen a dimensional gateway to the VOCALOID world using her dragon magic. The brilliant blue light appeared once again in the center of the hall. "It seems it's time for us to say goodbye." がくぽ spoke with a hint of reluctance. "Thank you so much for everything today." "You're always welcome to visit again." レイン replied with a warm smile. "Perhaps we could even hold a concert together someday." "Really?" ルカ's blue eyes immediately sparkled with excitement. "Then I'll make sure to prepare our very best songs!" 城之内 immediately raised his hand. "Count me in too!" レイン glanced sideways at him. "Of course, 克也." She deliberately paused. "But... you'll have to wear that puppy costume onstage." "WHAAAAAT?!" 城之内's horrified cry echoed throughout the castle. がくぽ finally burst into laughter. ルカ covered her mouth, giggling as well. Amid the cheerful laughter, the two lovers from the world of music stepped into the portal. Just before leaving, ルカ turned around and waved. "レイン! 城之内! I'm sure we'll meet again someday!" "Yes." レイン smiled tenderly. "I'll be looking forward to that day." The dimensional portal gradually disappeared. Silence returned to the throne room. 城之内 let out a long sigh. "Phew\... Man, what a crazy day." "Hehe. It certainly was." レイン returned to her throne and gently patted her thighs. "Now then, 克也." "...What?" "Come back here." "No way! I'm not playing your puppy anymore!" "But..." She gave him a mischievous smile. "Didn't you just promise that you'd always stay by my side?" "THAT'S COMPLETELY DIFFERENT!" レイン laughed softly. The next moment, she reached out and gently pulled 城之内 into her embrace. "I know." She rested her forehead against his. "Even if you never wear that costume again, I'll still love you just the same." 城之内 froze for a moment. Then, finally setting aside his embarrassment, he gave her a gentle smile. "...You really are impossible, you know that?" He wrapped his arms around レイン. "I love you too." The dragon queen's crimson eyes shimmered with happiness in the warm firelight. Once, she had believed that the long life of a dragon was destined to be filled with loneliness. That was until a certain blond young man appeared in her life—a little reckless, always trying to act tough, yet someone who would never abandon her. And today, the arrival of two singers from another world had helped her understand something even more deeply. Whether through dragon fire, dueling, or music, the boundaries between worlds could be overcome. What truly connected people from different dimensions was the desire to protect those they held dear. Outside the castle windows, countless stars sparkled across the night sky. レイン leaned against 城之内 and slowly closed her eyes. "克也." "Hmm?" "Next time, let's visit their world together." "Sure!" 城之内 grinned. "But I've got one condition!" "And what would that be?" "You're absolutely NOT making me wear that puppy costume when we go!" レイン fell silent for a second. Then, a mischievous smile appeared on her face. "...We'll see about that." "レイン——!!" Their cheerful voices once again echoed throughout the Black Dragon Castle.