Three days after the school trip, I woke at 5 a.m. as usual, recovered from my ultimate technique’s strain. Time for training.

Careful not to wake the others, I slipped out of bed. Sometimes Miu or Koneko grab my clothes, but a gentle head pat calms them.

Looking at their cute sleeping faces—satisfied! Rias and Akeno’s chests were fully exposed. Brain-saved! Morning eye candy!

Xenovia was discharged yesterday. Her wound healed faster than mine, no noticeable scars. Relieved.

My bangs are getting long—time for a haircut. But first, changing.

I grabbed my tracksuit, but as I shed my pajamas—

Bounce.

…Huh? What was that?

Bounce?

Suspicious, I looked at my chest. Two round things that shouldn’t be there.

…No way…

Cold sweat ran down my cheek.

What is this!?

I grabbed my crotch—nothing! My buddy of twenty years—gone! It was there yesterday!

Peeking into my pants—gone! My son’s vanished!

The chest, the disappearance… No!

I shook my head, rejecting the thought.

Not believing this!

I rushed to the bathroom mirror. Reflected was a long-haired brunette girl, curvy, unmistakably female. Cute face, hair to her waist.

Staring, hand on the mirror, my eyes twitched. “What the hell!?”

“Are you really Issei?” Rias asked.

My scream woke everyone. They rushed to the bathroom, shocked at my new form.

Now, in my room, I sat on the bed, scratching my head. “I’m telling you, it’s me! Please believe me!”

They hesitated. I get it—I wouldn’t believe it either. Waking up as a girl? Comic book stuff.

Miu, beside me, asked, “Where did we meet?”

“Sirius’s castle. After dueling him, he entrusted you to me.”

“Correct. When I came to this world, you left me in your room to talk to your parents. Where was I when you returned?”

“Under my bed, reading my… collection.” Embarrassing memory.

“Correct. So, you’re definitely Issei. Or… big sister now?” Miu said.

Only we’d know those details. Good questions.

“When did we first make a baby?” Xenovia asked.

“Never! Don’t say misleading stuff!” I snapped.

“That’s Issei’s reaction,” Xenovia nodded.

Finally, they accepted I’m Issei. Small win.

“Why’d this happen? Any clues?” Alice asked, hand on chin.

I racked my brain. The ultimate technique against Cao Cao? No aftereffects like this. Before that, nothing odd. Since returning, I visited Xenovia in the hospital—she tried jumping me, but a nurse stopped her. Yesterday…

“Wait, I got something.”

“A cause?” Rias asked.

“Maybe. It’s all I can think of.”

“What?” Alice demanded.

Yesterday…

Xenovia’s second hospital day. Her wound healed, so she was discharged. We held a small party at home for her—and me, since my recovery got sidelined by other events.

“To Xenovia and Issei’s recovery—cheers!” Rias led.

“Cheers!” we echoed.

The table overflowed with Mom’s, Miu’s, and others’ cooking, plus takeout sushi. Looked delicious!

Miu handed me a plate of karaage. “You love these, right?”

“Thanks!” I popped one in. Crispy outside, juicy inside. “Delicious! You’ve improved.”

“Hehe, studied up. I wrapped the meat in mayo before frying—locks in the juices.”

“Nice trick.”

“Wanted you to enjoy it,” Miu smiled.

Guh! So cute! “Thanks, so good I’m tearing up!”

“Exaggerating,” she laughed.

Not exaggerating—her love hit me hard.

Another plate appeared—nikujaga, from Alice. “I… learned from your mom…”

“You made this?” I asked.

“Y-yeah…” she nodded shyly.

Alice, cooking? She was terrible at it during our travels. Morris assigned Risha to cook after Alice’s failures. She nearly burned down a castle kitchen once, banned since. And now, nikujaga?

“Don’t want it?” she asked, nervous.

“No, I’ll eat it. You made it for me.” I took the plate. Potatoes were slightly mushy, but decent for her.

“Here goes.” I took a bite, Alice watching anxiously. “How is it?”

“Delicious.” Honest opinion. It tasted like Mom’s. “I’m surprised, Alice.”

“Surprised, huh? Rude… but I’m glad you like it,” she said, blushing. Her fingers were covered in bandages.

Miu whispered, “She worked hard. Barely cooked before, but wanted to make it for you.”

I see…

“Alice, thanks. Really good.”

“Y-yeah…” Her face turned tomato-red.

Maybe Asia could’ve healed her cuts, but she was out shopping.

“Getting cozy, you three,” Azazel-sensei teased, beer in hand, eating sushi. “You unconsciously charm girls, Issei. Natural talent.”

“Charm? How?”

“Your actions, words—think about it. Just now, too.”

Really? I just say what’s on my mind.

[Quite the talent,] Ddraig said.

[That’s why everyone likes him,] Ignis added.

I know they like me, but…

Sensei smirked. “Next, a kingdom’s princess? Will Alice fall too?”

“What!?” Alice and I gasped.

This guy! Look, Alice ran off, embarrassed!

“Haha, I’ll get her,” Miu said, chasing after.

“Sorry, Miu.”

“Eat, huh? Harsh wording,” I grumbled.

“No harem king without juggling multiple girls,” Sensei said.

“Ugh…”

“Your pushover nature needs work first.”

“Ughh…” The girls’ energy overwhelms me! I want that confidence!

Sensei sighed. “You’ve known a woman with Miu, yet still so timid. Learn more about women.”

“More?”

“Yup.” He pulled out a cartoonish gun. “Made this for Sacred Gear research. Switches male to female, female to male. Gender-swap gun. Still experimental.”

Gender-swap gun? What’s that got to do with Sacred Gears?

His grin gave me chills. Nothing good comes from that look.

“You’re my test subject, Issei.”

“What!? Why!?”

“It’ll be fun.”

“That’s not a reason! Test it in your lab!”

“Need a good subject. You’re perfect.”

“Perfect how—!?”

“Take this!” He fired.

No discussion!?

ZAP! Light hit me, enveloping my body.

Rias yelled, “Azazel, what’d you do!?”

“Just a little experiment.”

“You… Issei, you okay?”

“Yeah… Sensei, nothing happened.”

“Huh?” He looked puzzled, checking the gun and me. “It should’ve worked…”

“Broken? Good, but stop experimenting on me!”

That was yesterday. The gun’s effect hit now?

“It’s Azazel,” Rias sighed. “He’s off discussing yokai cooperation, so we can’t reach him.”

“Hard to call him now,” Akeno added.

“So I’m stuck like this!?” Live as a girl? He said know women, not become one! His dumb invention ruined my harem king dream!

“Can’t you use qi to fix it?” Koneko asked.

“Tried. No luck. Rossweisse, Miu—any magic?”

“We’d need to analyze the spell first. I’ll check,” Rossweisse said, deploying three magic circles above my head.

“This is…!” she gasped.

“What’s wrong!?”

“Nothing. It’s normal,” she said.

“Huh? Your gasp?”

“Nothing showed up, so I was surprised.”

Not helping!

“Miu, check me!”

“Okay.” Miu deployed multiple circles around me. “This is…!”

“What!?”

“Nothing.”

“Same as her! Really!?”

“Sorry,” Miu said.

“It’s not your fault!”

Both top mages found nothing!? I’m doomed.

“Issei-senpai’s a girl…” Koneko muttered.

“Don’t worry, Koneko. I can prove he’s a guy,” Miu said.

“Miu took Issei’s virginity,” Akeno teased.

Miu blushed. Total self-own. And now the girls’ glares are on me.

Clearing my throat, I said, “Until we reach Azazel, I’m stuck. It’s his fault—make him fix it.”

Rias nodded. “You need to return, or I can’t… you know.”

“We’ll tie him to a chair if needed. I want you to take my virginity too,” Akeno added.

Their auras are terrifying! Azazel, hurry or you’re dead!

Reyna eyed me. “You need clothes. You’re shorter, body’s different.”

True. My tracksuit’s baggy, hard to move in.

“Let’s try on clothes,” Rias suggested.

I nodded, stripping the tracksuit.

Bounce. My chest jiggled.

I love breasts, but my own? I’m Xenovia-Irina-level, not Rias-tier. Weird situation.

Alice stormed over and grabbed my chest. “Why do you have these!?”

“I don’t know!”

“Flaunting them? Picking a fight!?” Her temple vein bulged.

Terrifying! “How much do you hate your chest!?” I yelped. “Stop, they’ll tear off!”

“Tear off! Why do you get big ones while I’m stuck flat despite daily massages!?”

“You do that!?” Pain! “Someone help!”

The girls just laughed bitterly. No help!?

“Too intense…” Asia said.

“Can’t approach…” Irina added.

Alice is that scary!?

Koneko approached. My savior!

Grab. “Issei-senpai, this is unforgivable.”

“Not you too!?”

“Big breasts are enemies. Fakes especially.”

She squeezed harder. “OW! Too strong!” Her Rook strength was insane!

I endured hellish pain.

“So cute! You rock this, big sis!” Miu gave a thumbs-up.

I was their dress-up doll, forced into women’s clothes. Rias and Akeno gleefully brought their outfits—even underwear.

Never thought I’d wear girls’ underwear. I’m in Miu’s white dress now.

“Big sis, huh?” I muttered.

“You’re a girl now, right?” Miu said.

So much dissonance, but fine—I gave up.

“How’s this?” Reyna held a blue shirt and white skirt, her usual casual wear. “And a bra.”

“Bra too…?” Thᴇ link to the origɪn of this information rᴇsts ɪn novｅlfire.net

“Of course♪” She’s enjoying this.

They all are.

“Next, this,” Rias said.

Pointless to resist. I put on Reyna’s underwear.

In the basement bathhouse, I joined the girls. Undressing, I saw my lower half—nothing male left. Depressing.

The mirror confirmed it: fully female, curvy, big-breasted.

Can I go back?

Sighing, I entered the bath. “We’ve been waiting, Issei,” Akeno said, guiding me to the shower area where Rias and Miu waited.

They lathered body wash. Oh no…

“We’ll wash every inch,” Akeno purred.

Knew it! Happy, but complicated feelings in this body!

Miu approached. “Stay still, big sis.”

Her hands touched my chest— “Eep!”

What a sound! I covered my mouth, too late.

“Feeling it?” Miu teased.

My face burned.

“So red,” Akeno giggled.

“Issei like this… interesting,” Rias said.

This is bad. Totally out.

Thud. They pinned me down—Miu on top, Rias and Akeno flanking.

Their skin pressed against mine, breasts overwhelming, slippery soap amplifying it.

Even as a girl, this is bliss! Supreme!

“Like that time, but girl-on-girl now,” Miu said, flushed, our chests rubbing.

My body’s erotic, huh. Our tips brushed, sending weird tingles.

Akeno whispered, “Want to learn a girl’s sensitive spots? Rare chance.”

“Uh—”

What followed, I’ll leave to imagination. I nearly opened a new world’s door.

“Sorry, sorry! Didn’t expect the effect to hit a day later,” Azazel laughed, scratching his head.

That night, we reached him. I took another shot from the gun and instantly reverted to male.

It was faulty yesterday.

“Not sorry enough! This was a disaster! Reflect!” I yelled.

“I’ll check it properly next time. The end.”

“An essay!?” He’s not sorry! I’ll tell Shemhazai through Reyna. Get tied to a chair!

He patted my shoulder. “Learned about women, right?”

“Well…” True. I get their bodies now. Useful reference.

It was intense—nearly blacked out a few times. The girls got excited seeing female me. Their personalities are wild.

“Use this to keep pushing,” he said.

“Harem king, huh? Closer now?”

And so, Issei became a girl. Unlike the original, where the gender-swap gun wasn’t used on Issei, I tried it here.

Source: Webnovel.com, updated by NovelKeep