Reimu stood atop the roof of the Hakurei Shrine; her arms crossed as she looked out over the vast emptiness that had taken over Gensokyo. The view, which had once been vibrant and alive, now felt barren. The expanse of land before her was a patchwork of vanishing landmarks and faded memories. She used to enjoy this view on quiet evenings, often with Marisa by her side, the two of them sharing idle conversation while gazing out over the familiar landscape. From here, she could always see the human village, the Forest of Magic, Misty Lake, and even the distant Scarlet Devil Mansion.

But now, all that lay before her seemed like a distorted version of what had once been. The Forest of Magic had grown, sprawling over the land where Misty Lake and the Scarlet Devil Mansion had once stood, as if the woods were swallowing the remnants of Gensokyo itself. What was left seemed unnatural still, devoid of the usual bustling life she had come to know. Only the human village remained intact, though Reimu knew from word around the village that they were in no better state, struggling to cope with the rapid disappearances and fading landscapes.

She felt a dull ache in her chest as she thought of all the friends she had lost, the ones who had simply vanished, leaving behind nothing but the emptiness. There was nothing she could do to stop it, nothing she could resolve this time. The thought lingered in her mind: when would it be her turn?

A familiar gap opened beside her, and Yukari Yakumo emerged with her usual enigmatic smile. Reimu didn't turn her head to greet the gap youkai, instead muttering in a tired voice, "You were gone a while." She glanced at Yukari with a blank, resigned expression.

"I was checking in on the Animal Realm," Yukari replied. "To see if they were faring any better." She spoke lightly as if reporting on an insignificant errand.

"And?" Reimu pressed, though there was no real hope in her tone.

Yukari's eyes darkened ever so slightly as she delivered the news. "The Primate Spirit Garden has vanished. Along with it, Keiki."

Reimu's eyes widened slightly at the mention of the sculptor god. "Keiki..." she whispered. "Marisa told me about her... back when she resolved the Beast Spirit Incident." Her voice faltered, her gaze drifting back over the landscape. "Everyone is dropping like flies. Is there anyone left?"

"A few remain," Yukari replied, her expression contemplative.

The shrine maiden's voice trembled with the slightest hint of concern. "Marisa?" she asked a thin thread of hope entwined in the question.

"Her section of the Forest of Magic is still intact," Yukari confirmed. "She hasn't faded yet."

Reimu exhaled, a quiet "Thank God" escaping her lips, though her relief was fleeting. She still feared for the magician's safety. If anyone deserved to be left standing in Gensokyo's twilight, it was Marisa.

Yukari turned away from the shrine maiden, her gaze distant as though calculating something. "It appears we won't have to wait long," she mused. "They're on their way."

Reimu raised an eyebrow, the faintest spark of curiosity breaking through her sombre demeanour. "They are? Well, that does make things a little easier." She turned towards the path leading up to the shrine, her arms still folded. "Alright, then. Let's see if they've learned anything useful."

The feeling of tension hung thick in the air as Marisa and I landed at the Hakurei Shrine. She hopped off her broom and dusted herself off while I stretched my arms. Before either of us could say a word, Reimu emerged from the shrine, her expression weary and distant, like someone carrying the weight of an entire world on her shoulders. She walked straight toward Marisa, and for a moment, it looked like she was going to scold her, but instead, she wrapped her arms around Marisa in a sudden, unexpected embrace.

"Thank goodness you're alright, Marisa," Reimu murmured, her voice filled with a rare hint of vulnerability.

Marisa, who was always ready with a teasing remark, hesitated. She could sense that this wasn't the time for jokes. I saw her soften as she hugged Reimu back, her expression shifting to something quieter, more sincere. "It's good to see you too, Reimu," she whispered.

Reimu pulled away and glanced at me, a faint smile tugging at the corners of her lips. "Nice to see you're still kicking, too, Marcus."

"Sorry we didn't get here sooner," I replied, scratching the back of my head. "We only heard about what's been happening recently."

Reimu shook her head, looking back toward the emptiness beyond the shrine. "You were recovering from the effects of that Forbidden Tome. Besides, this came out of nowhere for most of us. We didn't even realise what was happening until it was too late."

"Can we come in?" Marisa asked, breaking the sombre silence that followed.

"Of course," Reimu said, her voice warming slightly. "I'll make some tea. And a hot chocolate."

My eyes lit up. "Oh, you're the best, Reimu."

We followed Reimu inside the shrine. It felt strange walking into the familiar space, knowing so much of Gensokyo had faded. Everything was too quiet. I glanced around the main room as we entered, noticing a figure standing by the wall. A woman with long, golden hair, wearing a purple dress and a smile that seemed out of place in this dire situation.

"Who's that?" I whispered to Marisa.

She didn't lower her voice when she replied. "That old hag is Yukari Yakumo. The border youkai. She might look all innocent, but she's dangerous. Always up to no good."

Standing before Yukari, I got a better look at her. Her smile was polite, but her eyes held something deeper, something that seemed to cut right through me. "You must be the librarian from the outside world I've heard so much about," she said in a smooth tone. "It's a pleasure to meet you, though I wish the circumstances were better."

I wasn't sure what to make of her. "So, you're the border youkai? What does that mean, exactly?" I asked, trying to keep my voice steady.

She waved a hand dismissively. "It's quite simple. The barrier that separates Gensokyo from the outside world is my creation. I can open gaps between the worlds."

Her explanation didn't exactly ease my nerves. Something was unsettling about the idea that someone could manipulate reality so casually. I caught the amusement in Yukari's eyes as she looked at me. "You're thinking I might be behind all this, aren't you?" she said.

Marisa and Reimu glanced at me, their expressions uneasy. "I can't rule out the possibility," I said carefully.

Yukari gave a slight nod as if expecting that response. "A reasonable suspicion. I do have the power to send people to and from Gensokyo. But..." She turned her gaze toward Reimu, who was staring back with suspicion. "This is the part where I'm supposed to say I'm not the culprit, isn't it?"

Reimu sighed. "Well, it would be reassuring if you did."

"You have every right not to trust me," Yukari continued. "But I wish to prove my intentions are genuine." Out of nowhere, a book appeared in her hands, its cover bearing the unmistakable markings of a Forbidden Tome. "Perhaps this will interest you. Forbidden Knowledge Vol. 8: Future."

The sight of the Tome made me take a step back. It was real. I could feel the power radiating from it, even from a distance. Reimu's eyes widened in shock, and she immediately snapped at Yukari. "You've been carrying a Forbidden Tome this whole time and didn't tell anyone?! This only makes you more suspicious!"

Yukari's expression remained calm. "I assure you, I have no interest in its power. I haven't even opened it. You can see for yourself, Marcus."

I approached the Tome cautiously. The energy flowing from it was unmistakable, but I sensed no signs of corruption around Yukari. She wasn't lying. "Where did you find this?" I asked, my voice almost a whisper.

"It came to us through the Netherworld. I managed to retrieve it before it fell into the wrong hands," Yukari explained. "I intended to return it to you when the time was right."

Marisa's voice cut through the heavy silence. "Is she telling the truth, Marcus?"

I looked at her, then at the Tome, and felt a surge of determination. "Can you all step back?" I muttered, opening the book with trembling hands. The moment I did, the familiar voice surged into my mind, its screams of fractured truths and chaotic visions threatening to overwhelm me.

"There was never us; we never mattered!"

I slammed the book shut, gasping for air as Marisa rushed to my side, her hand on my shoulder. I felt the power settle, the knowledge sinking into the depths of my mind. I made the Tome disappear, merging it with the others I had collected.

"It's the real deal," I managed to say, still catching my breath. "Alright... I believe you, Yukari."

Yukari's smile returned, but there was a subtle relief in her eyes. "I'm glad to hear that. Now, shall we discuss what we've found?"

Marisa spoke up before I could. "We talked to Aya before she vanished. She was trying to stake out the culprit, but… we lost her. She was snatched."

Reimu's brow furrowed. "With her speed? I wouldn't have expected her to be taken…"

"Not all is lost," I said, my voice steadying. "She managed to take a photo before she disappeared. It could show us who—or what—took her."

"That would be useful," Yukari remarked, her interest piqued. "Do you have the photo with you?"

I shook my head. "No, we left it at the Kirisame Shop. Reisen went to collect it."

Reimu gave Marisa a curious look. "You went to your family's shop?"

Marisa nodded, a faint smile forming on her lips. "Yeah... I... I made amends with my dad."

For the first time, Reimu's sombre expression softened. "I never thought I'd hear that. Well done, Marisa. I'm proud of you."

"Thanks, Reimu," Marisa replied quietly.

Yukari turned to Reimu, a hint of mischief returning to her gaze. "Now, while we wait for Reisen, how about that tea?"

Reimu let out a dry laugh. "Is that all I'm good for these days?" she said, though there was a faint glimmer of amusement in her voice. She led us further into the shrine, where we could hopefully find some answers.

We sat around the low wooden table, cups of tea and hot chocolate steaming in front of us. I wrapped my hands around the warmth of my mug, taking a sip, hoping the heat would calm my nerves. The silence in the room was heavy, almost suffocating, as if the air itself had absorbed all the tension and was pressing down on us. Reimu stared into her tea, looking as if she was miles away in thought, while Marisa fidgeted slightly beside me. The only person who seemed unaffected was Yukari, who drank her tea with a serene smile as if she were attending a casual afternoon tea party.

Reimu finally broke the silence. "Reisen is taking a while, isn't she?"

"It's not impossible. Something happened to her," I muttered, a sinking feeling forming in my gut. I quickly downed the rest of my hot chocolate, the rich taste doing little to soothe my worry. "I'm going to check."

Before I could stand, Marisa grabbed my hand, her grip firm. "Not alone, you're not," she said, already standing up. "I'm coming with you."

Yukari's voice floated over to us, teasing and light. "Ah, young love. How lovely."

Marisa didn't bother to dignify Yukari's comment with a reaction. Her focus was already elsewhere as we made our way outside. Reimu followed us to the entrance, lingering behind as we took to the air. The atmosphere outside felt heavier than before, a sense of dread thickening with every breath. I looked up at the darkening sky, then back at Marisa as she flew up ahead on her broomstick. She stopped suddenly, staring into the distance, her expression morphing into one of pure horror.

My heart sank at the sight of her like that. I flew up to her level, my pulse quickening as I followed her gaze. Where the Human Village once stood, there was now… nothing. No rooftops, no streets, not even a trace of the people who lived there. It was just an empty void like a black hole had swallowed the entire village without a sound. All the humans were gone, and that realisation hit me like a punch to the gut. Marisa's father…

"Dad!" Marisa screamed, already surging forward on her broom in a frantic rush.

Before she could get too far, a gap tore open in the sky. It was unmistakable—the dark shadows, the unnerving red eyes. I froze, my breath hitching as I recognised it. This was the same gap I'd seen back at the Library when I was tracking down the invader. A chill crawled up my spine as if a buried memory had been ripped from the back of my mind and brought to the surface.

Suddenly, a significant slash of energy lashed out from the gap, cutting through the air with lethal precision. Before I could react, I felt Reimu yank me back, narrowly avoiding the attack as it sliced the shrine's gate clean in half.

And then she emerged—Yukari, stepping out of the gap with an eerie calmness, her gaze settling on me. But there was something different in her eyes, something that felt deeply unsettling. She wasn't smiling anymore. She looked… serious.

"There you are, dream walker," she said, her voice cold and almost accusatory.

"Yukari! What the hell are you doing?!" Reimu shouted, her grip tightening around her purification rod. "What is the meaning of this?"

But before anyone could make sense of the situation, another gap opened, and a second Yukari emerged, positioning herself between us and the first. The sight was almost surreal; I felt like my mind was struggling to catch up to what was happening. Marisa voiced the confusion we were all feeling. "Wait, there's two Yukaris?!"

The second Yukari—the one I knew—shook her head, her expression clouded with concern. "I am able to communicate with the other Yukari Yakumo of other worlds," she said, her voice steady. "But this one… I cannot. Who are you?"

The first Yukari's lips curled into a cold smile. "I am the real, true Yukari Yakumo," she declared, her voice dripping with disdain. "And I've broken through to this fake world for one purpose." Her gaze locked onto me, and my blood ran cold. "To kill him."

"Like hell, you're going to do that!" Marisa shouted, her anger flaring as she raised her Mini Hakkero, ready to fire. But before she could even unleash a spell, another gap appeared beneath her, sucking her in. In an instant, Marisa was gone, vanished into the darkness.

"Marisa!" I screamed, my voice cracking with desperation. I felt a crushing weight of dread sink into my chest. She was just… gone.

Reimu's face twisted with fury as she pointed her purification rod at the twisted Yukari. "You'll pay for that!"

The other Yukari barely acknowledged her. "There is nothing to pay for," she said, her tone disturbingly indifferent. "None of this is real."

We all froze at those words, the implications sinking in like a dagger. Even the Yukari I knew seemed unnerved, her eyes widening with a rare flash of genuine fear.

Floating around the twisted Yukari were three Forbidden Tomes, their presence dark and oppressive. I recognised the titles: Vol. 5: Purpose, Vol. 6: Truth, and Vol. 9: Freedom. The aura around her was suffocating, as if the Tomes were feeding her power far beyond what I could comprehend. The look she gave us was not the typical carefree expression I had come to associate with Yukari—it was one of deadly seriousness.

"This is where your journey ends, slave of Alexandria," she said, her voice echoing in the air. "It's time for you to wake up."