This was Yu’s room.

  The ceiling light poured down a sterile white glow, carving sharp edges into everything he owned—desk, bed, shelves, even the thin curtain by the window that never quite hung straight. His mechanical pencil lay where he’d abandoned it, rolling slightly against the spine of an open textbook. A notebook sprawled across the desk, pages wrinkled at the corners, the folded page of a reference book still pinched between his fingers from earlier. Half-read guidebooks, a messy pile of handouts, a cracked eraser ground to dust at the edge of the mousepad.

  All of it was the scenery of his everyday life. Familiar enough to disappear.

  His jersey was tossed on the bed in a loose knot of fabric. The curtains were parted just a little, letting in a thin night draft that lifted the hem and made it breathe like a living thing. The air smelled like paper, laundry detergent, and the faint metallic note of a charging cable that had been warm too long.

  It should have been nothing more than another slice of yesterday.

  And yet—The presence standing in the center of the room made that “everyday” shatter instantly, like glass struck at a single point.

  Yu didn’t understand how his body found prayer before it found language. He only knew that he wanted it to be wrong. Please. Please let this be a mistake. He rubbed his eyes hard enough to hurt, blinking until tears filmed his vision. The room wavered, the white light smearing, the corners softening.

  When he opened his eyes again, she was still there. Silver hair caught the fluorescent glare and threw it back in bright strands, as if the light couldn’t decide whether to obey physics around her. Every subtle shift left a faint impression in his vision—an afterimage that made his brain insist something was glitching, something was tearing, something was—

  No. Not a screen. Not an app. Not a broadcast. Reality.

  The woman’s clothes looked like they belonged to another era, another logic. A blue cloak with a weight that didn’t exist in modern fabric. Trim and ornamentation so precise it felt handmade, not mass-produced. Leather and metal that had been crafted by people who didn’t know plastic existed. At her hip, a rapier hung with casual intimacy, as if it were part of her posture.

  Claval.

  He knew that name the way you knew a famous streamer’s handle—he’d heard it through EWS, seen it in highlight clips and comments, watched her move through ancient ruins and magical beasts with the unbothered poise of someone born into danger.

  But that had always been through a screen. Now she stood in front of his desk as if she’d stepped out of the phone itself and decided his room belonged to her.

  A hard sound landed in the silence. Thud. Her boot on his floor. The noise was too solid, too loud. It made Yu’s skin tighten. The air shifted around her with the subtle pressure of an actual body occupying space. And there was a scent—faint, sweet, foreign. Something green and sharp like crushed leaves, something iron-dark like old blood, and underneath it a dense, clean hum that didn’t belong in Japan at all. Mana.

  His throat went dry so fast it felt like he’d swallowed sand. His breathing turned loud in his own ears, embarrassingly human. His heart slammed against his ribs hard enough that he had the irrational fear the entire room could hear it.

  “…No way.” The murmur slipped out without permission, thin and useless.

  Labels tried to line up in his mind—dream, nightmare, hallucination, prank, delusion—then scattered. None of them fit the weight of her presence. None of them explained the way his floorboards had accepted her boot like it was normal.

  Claval smiled. It wasn’t a wide grin. It was soft, controlled—graceful like a performer stepping onto a stage, certain of the audience’s attention. She tilted her head slightly, platinum-silver hair sliding over her shoulder, and the movement was so smooth it made the rest of the room feel cheap by comparison. Her boots clicked as she approached him without hesitation, each step steady and sure, as if she’d done this a thousand times.

  “Nice to meet you, Yu.” Her voice was warm—almost sweet—falling directly into his ears with a clarity that made his skin prickle. “How do I look… when it’s not through a screen?”

  Yu’s brain tried to respond and failed. His thoughts were too crowded. Rize. The hut. The observation network. The way the EWS UI had glitched before—no viewer count, no comments, the wrong interface. The way Claval had been on the other side, hungry with intent. And now— Her gaze locked onto him.

  Her irises looked like jewels in the fluorescent light, and for a moment he had the sensation that the room’s brightness was bending toward her, not the other way around. It was hard to look away, like staring into a river current that wanted to drag him under.

  “…How do you… look…?” His voice barely made it out, thin with disbelief. His hands shook. He didn’t know where to put them, so he clutched the edge of his desk like it could anchor him. The desk’s laminate was cool and ordinary under his palms—proof that he was still in his own room—yet his skin kept insisting that the ordinary had been invaded.

  Claval’s attention drifted away from him, curiosity flickering like a cat’s. She leaned slightly toward the desk, eyes catching on the notebook as if it were a relic.

  “So these are your writing tools?” Her tone held genuine interest, not mockery. “Strange… all these symbols look unfamiliar.” Her fingers reached out.

  Just the act of her hand hovering above the paper made Yu’s stomach drop. Don’t—

  Her fingertips brushed the page, tracing along a line of his notes with a feather-light touch, and suddenly his own handwriting looked foreign. The notebook, which had always been his, now felt like something fragile and exposed, like his private world was being read aloud.

  He moved before his pride could stop him. Yu slapped the notebook shut.

  “Don’t touch my stuff!” The sound was sharp. Too sharp. His voice cracked, louder than he intended. The room seemed to swallow the echo and then hold onto it, making his embarrassment linger.

  Claval didn’t flinch. She stepped back half a pace, shoulders lifting in a small shrug, unbothered in a way that made Yu feel like the unreasonable one.

  “Don’t be afraid,” she said, calm as a lullaby. “I only want to know more about you.”

  Soft. Kind. And still, the invasive weight of her presence didn’t fade. The air around her felt thicker, charged. Even the scent of his room—paper and laundry—had been repainted at the edges by something wild and other. Yu’s heartbeat hammered.

  “Why… why are you even here…?” He swallowed and tasted nothing. Claval’s smile sharpened by a fraction, as if she’d expected the question and enjoyed that it came.

  “Because I wanted to come.” Absurd. Simple. Unacceptable. “Because I wanted to see you, Yu.”

  The way she said his name made it feel too intimate for a first meeting. Like she’d been practicing it. Like the syllable belonged in her mouth.

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  Yu dragged a hand through his hair, fingers scraping his scalp as if pain could reset him. Think. Think. If I can just—His thoughts collided again. EWS. Observation. Mana. Rize. Claval. Too many elements. Too little oxygen.

  “…Enough already!” The words burst out with helpless frustration. “Claval! In this country—you don’t wear shoes inside the house!” He jabbed a finger toward her feet, because his brain latched onto the only problem he could name.

  It came out too fast, too desperate, too domestic for the apocalypse happening in his room.

  Claval blinked. She looked down at her boots, then back up at him, genuinely puzzled. For several seconds she seemed speechless, as if the concept had landed in her mind and bounced off.

  “…Your feet?” she said finally. “Yes!”

  “You can’t walk around indoors with shoes on! The floor gets dirty!” Yu’s hands flailed toward the floor, toward the reality of dirt and dust and the stubborn fact that his mother would kill him if there were footprints. Claval’s lips pursed.

  “…What a troublesome world,” She tilted her head like a bird listening for meaning. “Is the floor holy ground?” she murmured. Yu made a strangled sound in his throat.

  “No. It’s just—” He cut himself off because the explanation felt ridiculous even to him. I’m arguing about shoes with an adventurer from another world in my bedroom. The absurdity was a rope around his chest, tightening.

  He grabbed her wrist. The cold metal of her gauntlet shocked his palm—proof again that she was painfully real. The texture wasn’t plastic, wasn’t costume. It was metal with weight and chill, worn smooth at the edges by use. It made his skin gooseflesh instantly.

  “Just come here,” he said, breath tight. “I’ll explain!”

  They clattered down the stairs. Yu’s socks slipped slightly on the wooden steps, his grip firm on her wrist. Claval didn’t resist. If anything, she seemed amused, letting herself be pulled as she looked around with open fascination.

  “So this is your home,” she said, tone almost delighted. “The walls aren’t stone or wood… strange. It feels hollow.”

  Yu didn’t answer. He could hear the blood in his ears. At the front entrance, he spun her around to face him, nearly tripping over the step.

  “Here,” he said, pointing to the genkan like it was a sacred boundary. “This is where you take your shoes off.”

  “Here?”Claval looked down at the slight drop, the tiled threshold, then back up. “Not outside?” she asked. “Yeah. Here.” Yu’s voice came out exhausted, as if he’d been explaining this for hours. “That’s the rule.”

  Claval shrugged lightly. She bent to undo the clasp on her boots. A metallic click echoed through the entryway as the fastening came free. Then another. The sound was too solid, too ancient for his modern house, like armor complaining about being asked to obey etiquette.

  She pulled the boots off with practiced ease and set them down neatly, which somehow made it worse. Like she could become domestic if she wanted.

  Her bare feet touched the cold floor. A shiver ran up her shoulders. She drew in a breath and let it out slowly.

  “…Cold,” she said, soft. Then, a faint smile curved her mouth, almost private. “But… not unpleasant.”

  Yu stared at her feet like they were evidence in a crime scene. This is insane. An adventurer from another world—barefoot in his house. In his mother’s house. Under his roof, under his fluorescent lights. Before he could find the next disaster waiting for him, it arrived on schedule.

  The front door opened with a metallic clack.

  “I’m home~” His mother’s voice floated in, bright and casual.

  Yu’s face went pale so fast it felt like his skin had turned to paper. His heart didn’t slow—it simply changed shape, becoming a cold, panicked weight.

  Claval turned casually, still barefoot, head tilting in curiosity.

  “…Oh?” His mother stepped in with grocery bags hanging from both hands. She paused in the doorway, blinking as her gaze moved from Yu to the girl in armor and a blue cloak standing in the entryway as if this were the most natural scene in the world.

  “Yu,” she said, tone mild, “a friend?”

  Yu’s throat tried to close. Think of something. Anything. Claval stood there, calm, beautiful, wrong—like she’d escaped a high-budget fantasy drama and wandered into his life with no warning.

  “Y-yeah, Mom!” His voice rose a pitch. “Uh… she really likes cosplay! So don’t worry about her being dressed like that! We’re rehearsing!” Yu forced a smile so stiff it hurt.

  He hated himself the moment he said it. It sounded ridiculous. It sounded like the kind of excuse adults saw through instantly.

  “Oh my,” his mother didn’t even blink twice. “That’s very detailed,” she said, eyes scanning Claval’s outfit with mild interest but no suspicion, like she was evaluating craftsmanship.

  Claval’s mouth twitched, as if she might laugh. Yu’s mother slipped off her shoes with practiced motions, stepping onto the raised floor without hesitation—without noticing, or without caring, that the barefoot armored girl had already obeyed the rule.

  “Have fun, you two,” she said, and walked past them toward the kitchen, humming softly as if nothing in her day had changed.

  The sound of her footsteps faded down the hallway. Silence dropped like a curtain. Yu exhaled shakily, realizing he’d been holding his breath.

  “Keeping secrets looks difficult.” Claval leaned in close, her voice lowering into a teasing whisper that brushed his ear. Heat rushed to Yu’s face, immediate and humiliating. His cheeks burned. His ears felt hot.

  “Shut up,” he hissed, but the words lacked bite. They were all he had. He took her arm—not as roughly this time—and guided her back toward the stairs.

  They went up again, quieter now, as if noise might summon his mother’s curiosity. Claval padded barefoot across the hallway, toes making almost no sound against the wood, eyes darting everywhere.

  She looked at the framed family photo by the stairs. She glanced at the light switches, the smooth plastic, the way the hallway light turned on without flame. Her expression carried the gentle wonder of someone trying not to show how lost she was.

  Back in his room, the fluorescent light greeted them with the same indifferent brightness as before.

  “So this is your room,”Claval stepped inside and breathed in, slow. “The walls aren’t stone… and even the smell is unfamiliar.” she said. “It smells like… paper and lightning.” Her gaze swept over his books, his desk, his bed like she was reading a landscape.

  Yu sank onto the edge of his bed, chest rising and falling too fast. The mattress dipped under him, familiar, grounding, and still it didn’t feel like enough.

  “…God,” he muttered, voice raw. “Seriously… don’t show up out of nowhere like that. I thought my heart would explode.”

  Claval moved closer, barefoot steps silent, and loomed slightly over him with that same composed presence. She didn’t need to raise her voice to dominate the room.

  “But I wanted to see you, Yu.” She simply existed, and the room rearranged itself around her.

  His heart lurched again, as if it were still auditioning ways to fail. Rize. EWS. Why is she here? Why now? Why like this? Everything overlapped, impossible to sort. The world had become a pile of tangled wires, and he couldn’t find the plug.

  Yu pressed a palm to his forehead, fingers digging into his skin as if he could hold himself together.

  “…Forget it!” he snapped, half at her, half at his own brain. “I can’t think straight anymore!” He looked up at her, forcing himself to meet that jewel-bright gaze. “You’re not an enemy, right?” The question sounded pathetic, but it was necessary. “Then… can we just start as friends?”

  Claval blinked. For the first time since she’d appeared, something in her expression cracked—a flicker of being caught off guard, as if she’d expected fear, anger, fascination, anything but that.

  “…Hmm. Friends, huh.” Her cheeks puffed slightly, the gesture almost childish, and she looked away with a small huff.

  There was something hidden under the words. Disappointment, maybe. Or something sharper, something possessive that hadn’t found a shape yet. Yu was too overwhelmed to read it properly. All he knew was that the air felt tighter between them.

  “Sorry,” he said, voice softer, stripped of defense. “That’s all I can manage right now.”

  He held out his hand. It felt absurdly formal, like sealing a treaty in a room that still smelled like laundry detergent. Like pretending this was normal enough to contain in a handshake.

  Claval stared at his hand for a long moment. Hesitation sat in her shoulders—subtle, but real. Then she reached out and took it. Reluctantly. Definitely. Her hand was small. Warm. Alive. Not a costume glove, not an illusion. Skin with heat. Fingers that closed around his with a sure grip, neither delicate nor crushing.

  “…You’re strange,” she said quietly. Yu didn’t argue. Under the fluorescent light, their brief handshake became something neither of them could deny: not quite friendship, not quite anything else, but the first undeniable connection between two worlds.

  And Yu felt it settle in his chest like a door clicking shut behind him—soft, final, irreversible.