Haikyuu!! Cursed Gender Swap!? Ushiwaka Became a Girl!?
Hinata Shouyou wakes up expecting an ordinary morning of training camp—not to find a stranger staring back from the mirror. A girl with wild orange hair and his same stubborn eyes. One scream later, he discovers he's not alone: Kageyama, Sugawara, and the rest of Karasuno have all fallen victim to the same bizarre curse. And it doesn't stop there—phone calls flood in from Aoba Johsai, Shiratorizawa, Nekoma, Fukurodani, and beyond. Volleyball's fiercest rivals, from the cool-headed to the downrig
Haikyuu!! Cursed Gender Swap!? Ushiwaka Became a Girl!? - Oikawa Tooru, transformed into a beautiful girl, barges in.
The second floor of Karasuno High's Second Gymnasium, the volleyball club room.
Morning light stained the dust-covered window glass white. Inside the club room, it was quiet—as if yesterday's chaos had been a lie. No, too quiet.
Hinata Shouyou, mindful of the girls' uniform skirt he was wearing, stole a glance at the small mirror by the wall. Messy brown hair with an orange tint. Big, round eyes. He still couldn't get used to the reflection he'd first seen yesterday morning. The skirt felt drafty, and the blouse was somehow tight around his chest.
"Haaah... seriously, can we really change back?"
The words slipped out. Beside him, bluish-black eyes glinted sharply. Kageyama Tobio. The tall setter, still in his baggy girls' uniform, leaned against the lockers.
"Obviously. We're going back. My tosses aren't meant for hands like these."
Kageyama clenched his fingers—now strangely slender. His hands were small. The feel of his tosses was off. He'd spent all last night gripping a ball to check, but the sense of wrongness never faded.
"Kageyama, already angry this early in the morning?"
A soft, gentle voice. Sugawara Koushi. His silver-tinted medium hair swayed smoothly every time he tilted his head. His soft, drooping eyes looked at the two of them with a troubled expression.
"Come on, you two. Did you eat breakfast properly? Today might be another long day."
Sugawara's voice had a strange warmth to it—just listening made the tension drain from your shoulders. Hinata nodded firmly.
"Of course! I ate three bread rolls!"
"I didn't eat. No appetite."
"That's no good. You need to put something in your body or you won't last. Let's go to the school store later. We can split a pork bun."
When Sugawara smiled, the air in the club room lightened just a little.
—Clatter.
Suddenly, the club room door burst open.
"Good morning~! Karasuno's little chicks!"
Time stopped for a second.
Standing there was a stunningly beautiful girl, flawlessly wearing the Aoba Johsai High girls' uniform.
Her chocolate-brown semi-long hair rippled lustrously in the morning light. Her large amber eyes sparkled like a cat that had just thought up some mischief. At the corner of her soft-looking lips sat a small mole. Even the legs extending from her slightly snug uniform skirt were shockingly well-shaped.
"W-why are you in a girls' uniform... wait, Oikawa-san!?"
Hinata's voice cracked. Kageyama tensed up with a sharp movement. Sugawara was blinking rapidly too.
"What's with those faces? It went out on the phone tree yesterday, didn't it? All of Aoba Johsai's players turned into girls too."
Oikawa—or rather, the former Oikawa Tooru—spun around once like a model. The hem of her skirt flared out softly.
"So I came all the way to Karasuno's shabby club room to gather information about this curse. Be grateful."
She smoothly pulled a hand mirror from the bag slung over her shoulder. She gazed at her own reflection, entranced.
"...Ahh, how cute am I? This face could be designated a national treasure. Actually, couldn't I just become an idol?"
"Are you really Oikawa-san? What the hell are you thinking, being turned into a girl?"
Kageyama's low voice. Oikawa let out a smug little laugh through her nose.
"What am I thinking? Obviously I'm enjoying it. I've got this beautiful girl body—spending it being negative would be a waste."
"Besides, my height hasn't changed much in this body. Still 182 centimeters. Model proportions, long legs, and I can still play volleyball perfectly fine. This curse isn't half bad."
"You're way too okay with this..."
Hinata was exasperated, but Oikawa's bold attitude left him feeling deflated. What was all our panic yesterday about?
"How rude. I'm just being positive. Besides, moping around won't break the curse, will it?"
Oikawa put the hand mirror back in her bag and looked at the three of them with clear eyes.
"I want my original body back. Because rather than aiming to be a national idol in this body, I'd rather go back to being a man and become the world's best setter. Plus, poor Iwa-chan is pointlessly getting flustered over me as a girl, which is hilarious in its own way. But still—I want to play volleyball as a man, you know?"
"So we're going to investigate the cause of this curse thoroughly. First, let's organize yesterday's information. Hey, Sugawara-san, there's a whiteboard in this room, right?"
Sugawara pointed to the corner of the wall.
"Ah, yeah. There is. ...As expected, Oikawa-kun is reliable."
Sugawara smiled softly. At that smile, Oikawa's expression relaxed just a little too.
"As expected of Sugawara-san, you get it. So, before the strategy meeting—how about we move our bodies a bit? Little Hinata, and not-so-little Kageyama-kun. I want to check how your new bodies feel."
"I'm not little!"
"For a girl, your height's not bad, right? But what about your jumping power?"
"I'll show you! Let's go, Kageyama!"
Hinata scrambled out of the club room and dashed down the stairs.
The Second Gymnasium court was filled with the cold morning air. The chill of the floor seeped through the soles of his sneakers. Hinata bounced lightly outside the line. His body felt light. No—too light.
"Alright, I'm jumping!"
"Hey, you haven't even warmed up yet."
"Don't sweat the details! Hurry up and toss!"
Kageyama took a ball from the cart. He held it with his left hand and touched the ball with the fingers of his right. The usual feeling. But his fingers were short. A thin layer of sweat formed on Kageyama's forehead. One deep breath.
"...Here it comes."
Without waiting for Hinata to jump, Kageyama sent up the toss.
—Smack.
A dry sound. The ball traced a different trajectory than usual. High, fast. But the sensation from his fingertips was just slightly off.
"It's here!"
Hinata jumped.
His body floated up lightly. His jumping power might actually have improved. Light, high, like a bird.
But the ball didn't come.
Thud.
A dull sound echoed through the gym. The ball had hit Hinata square in the face.
"Bwaberah!?"
Hinata fell on his backside onto the floor. His nose hurt. Hot. The inside of his nose stung, and tears welled at the corners of his eyes.
"That huuuurt! Are you trying to kill me!?"
"N-no! My hands—the feeling is different! One more time!"
"Take a break! My nose can't take it!"
Watching from outside the court, Oikawa burst out laughing, clutching her stomach.
"Ahahahahaha! What was that, you totally ate it! Your nose is a little red, Hinata-kun!"
"This isn't funny! You toss bastard!"
"How is it not funny? A full-power toss to a girl's face. From the King, no less. Ahaha, hilarious."
Oikawa pressed her stomach, wiping tears from the corners of her eyes, waving her hand dismissively.
"Hey, Kageyama. Don't let her laugh at you. ...Oikawa-kun, don't provoke him so much either."
Sugawara crouched down beside Hinata with a wry smile. He pulled a towel from his pocket and gently pressed it to Hinata's nose.
"Does it hurt? It doesn't look like there's any blood."
"I'm okay... Sugawara-san's towel smells nice."
"Jeez, what are you saying."
Sugawara lightly tapped Hinata on the head.
"...Sorry, Hinata."
Kageyama, still holding the ball, muttered quietly.
"One more time. This time I'll set it carefully. I want to get a feel for my new fingers."
"...Yeah. Bring it."
Hinata stood up and rubbed his nose.
"This time I'm smashing it through!"
The two stood at the center of the court again. Hinata took his stance behind the center line. Kageyama held the ball with both hands.
Kageyama slowly closed his eyes.
The feeling in his hands. The leather of the ball against his fingertips. The texture of the seams. The way the air escaped. It was definitely different from yesterday.
(More delicately. More—my will, into my fingertips—)
Smack.
This time, Kageyama clearly watched Hinata's movement before sending up the toss.
"Whoa, nice!"
Hinata sprinted. Accelerating in a straight line. He matched his approach and kicked off the floor.
—Bam.
The sensation of the ball sticking to his palm. Hinata swung his arm through with everything he had. The ball stabbed sharply into the far corner of the court.
"...Hell yeah!"
Hinata pumped his fist.
"That was great, you two!"
Sugawara's voice rang through the gym.
"...Huh?"
Suddenly, Hinata tilted his head.
He felt like he'd heard a voice directly inside his head.
(That toss just now was good...)
A low but soft voice. One he recognized.
This was Kageyama's voice. But Kageyama's mouth wasn't moving.
(Hinata's smile at the moment he hits the ball... I really do love it.)
The air froze.
"Eh... what did you just...?"
Hinata couldn't believe his ears. He'd definitely heard Kageyama's voice say "love it."
"What about what?"
"You just—in your head—said 'love it'...!"
"Hah...!?"
Kageyama's face turned bright red in an instant. Seeing that, Hinata's face grew hot too.
"W-why can you hear what I was thinking about you...!"
"How should I know! I'm the one who wants to ask! You were just going on about my smile or whatever...!"
"Shut up! That was—because your hitting point improved, I was praising you for being able to respond to a good toss! There's no other meaning!"
"Does a guy with no other meaning say 'love it'!?"
"I didn't say it! It was in my head! It has nothing to do with you!"
"It's leaking out! Right here!"
Their voices echoed through the gym. Kageyama, red to the tips of his ears, slammed the ball against the floor.
"Dammit! Why now of all times... my—my inner thoughts...!"
With that shout, Kageyama took off sprinting around the perimeter of the gym.
"Uwaaaaaaaaaah!"
Screaming like a banshee, in a girl's body, Kageyama ran with a demonic expression, just running. Oikawa watched with her mouth hanging open.
"...What is that. It's kind of cute. Actually, I'm kind of creeped out."
"This is the curse of visualizing romantic feelings. Probably, if you get within a 3-meter radius, your feelings toward the other person become audible as inner thoughts."
"Right. ...I find this phenomenon insanely entertaining. I mean, the King himself, turning that red, screaming, running around? That's admission-fee worthy."
"Don't charge admission! I'm dying here!"
Kageyama shouted while running. With every lap, his inner thoughts reached Hinata.
(I just want to set better tosses with Hinata.
I want to see Hinata's face when he smiles after hitting my tosses.
And my tosses will create the greatest spikes the world has ever seen.
For that, Hinata needs to get better. He has to.
But right now, he's not enough. So I'll pull him along.
Stay as my greatest weapon.
...God, shut up!)
"Uwaaaaaaaaaah! Disappear! My inner thoughts! Just disappearrrrrr!"
Kageyama's scream was swallowed by the gym ceiling. Hinata had his hands on the floor, desperately holding back laughter.
"Y-you... you were thinking something that intense...!"
"I wasn't thinking it! That's just—my honest passion for volleyball!"
"Yeah, yeah, sure, sure! But I can't help laughing—the content is just too pure."
Oikawa laughed, clutching her stomach, and stepped off the court.
"...Well, that's enough warm-up. How about you all hear my proposal now?"
Kageyama, out of breath, finally stopped running. He sat in a crouch, burying his face in his knees. Sugawara crouched nearby, patting his back gently.
"It's okay, Kageyama. We're all embarrassed together. I need to get used to it too."
"...Get used to what?"
"Secret."
Sugawara smiled mischievously.
Oikawa stood in front of the whiteboard.
"Listen up. The charm we found at the training camp yesterday—that's almost certainly the cause of the curse. But no one's actually looked into the origin of that shrine or the meaning of the characters carved on the charm, right?"
"Now that you mention it, we were in total chaos before we could investigate..."
"Right. So, investigation. First, Karasuno's library. We'll dig through the local history room—it's full of books o
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