Chapter 6: Her Power Level Increased... and So Did Her Bust?!

I've learned to dread the words "Yuuta, something feels different today."

Especially when they're spoken by a magical girl in a school uniform that's suddenly a little too tight around the chest.

It started like a normal morning. Well, normal for me now, which meant:

Avoiding Kana's increasingly suspicious glances,

Hoping Rika didn't barge into my house at 6 a.m. asking for "emergency affection,"

And praying I could make it through homeroom without being groped by accident.

Spoiler: I failed on all three counts.

Rika entered the classroom with a bounce in her step—and in her blouse.

"Yo, Yuuta~!" she said, waving a little too enthusiastically. "Sleep well?"

I blinked at her.

Something was off.

Her blazer fit... differently. Her buttons looked like they were holding back a structural failure.

Rika caught me staring and smirked.

"Oh? Noticed something?"

"I—! No! I didn't—!"

She leaned in. "You totally noticed."

"I noticed you're... more energetic today."

"Try again."

"I noticed you're being annoying."

"Still wrong."

She stepped back, clasped her hands behind her back, and puffed out her chest.The motion was both subtle and seismic.

And that's when I saw it.

She was definitely... upgraded.

Like someone had gone into her character model settings and slid the "bust" slider from "moderate" to "bouncing hazard."

"You're kidding," I muttered.

"I'm not," she said, looking pleased. "Turns out last night's skinship wasn't just a recharge—it triggered a passive evolution in my magical field. More power. More durability. And... well."

She gestured downward.

"A bit more in other departments."

I covered my face with both hands. "This can't be real life."

Kana appeared beside me.

She looked from me to Rika.

Then to Rika's chest.

Then to me again.

"You're staring," Kana said flatly.

"I'm not staring, I'm processing a magical anomaly."

"I see."

"No, really!"

"Uh-huh."

She walked to her seat.

Rika leaned over and whispered, "Think she's jealous yet?"

"She's going to kill us both."

At lunch, the chaos continued.

Rika insisted on sitting directly beside me, thigh to thigh, and pulled out a homemade bento with heart-shaped sausages and rice balls.

"I made these using your residual energy," she said proudly. "Wanna taste my... LOVE?"

"Don't say things like that where people can hear."

She opened her lunch box.

The rice balls were glowing faintly pink.

"I'm not eating radioactive snacks."

"Suit yourself."

She took a bite, chewed thoughtfully, and then...

Pop.

Her blouse button shot off like a bullet.

"...Did you just level up again?!"

"Maybe."

"I'm not doing this every day."

"Oh, you will."

Kana walked past, holding her tray, and paused.

"Yuuta," she said slowly. "You're feeding her now?"

"I'm not feeding her! She brought food!"

"She's glowing."

"She's always glowing."

"She just broke a button."

"She's structurally unstable!"

Kana shook her head and walked away.

Rika looked smug. "Definitely jealous."

After lunch, I confronted Rika behind the school building.

"What's happening to your body?"

"Gee, thanks, Casanova."

"I mean it! Your, uh—your figure is changing too fast. That can't be healthy."

Rika tapped her chin. "LOVE energy adapts based on emotional resonance. Since you're a high-output source, the more direct contact we have, the more my body syncs with your... ideal preferences."

I blinked. "My what now?"

"My transformation evolves based on your subconscious expectations."

I felt a cold chill run down my spine.

"So you're saying your bust is bigger because... I...?"

"Yup!" she said brightly. "You're a boob guy."

"I'm not!"

She gave me a look.

"You stared."

"I did not!"

"You processed a magical anomaly with your retinas."

"That's not—! Wait. Back up. So if I liked abs instead—"

"I'd probably get shredded."

"That's so unfair!"

"Welcome to user-based magic systems."

I sat down on a bench and put my head in my hands.

"This is going to get me expelled."

"Only if you're lucky," Rika said.

That night, I turned on the TV.

Big mistake.

"In other news," the anchor said, "our mysterious new Mahō Shōjo, nicknamed 'Bust-Up Angel,' has once again dazzled the city—this time by growing mid-fight!"

I choked on my water.

The footage was blurry, but clear enough to see Rika's transformation sequence.

She twirled, her chest expanded, and the crowd behind the camera started cheering like it was a fireworks show.

Online hashtags included:

#LOVEBuff

#MahouBounce

#PleaseStepOnMeAngel

I turned off the TV.

My life had become fanservice fodder.

And yet...

Later that night, Rika showed up again.

In full transformation mode.

She hovered outside my window like some sparkly succubus.

"Evening~"

"I am not opening this window," I said.

"You will when you see what I brought."

I cracked it open. "If it's lingerie—"

She held up a glowing scroll.

"This is a list of new passive buffs I unlocked thanks to our sessions."

I stared.

Some of them included:

+15% defense in thigh-high mode

Double critical chance if hugged before transformation

Bust inflation stacks with blushing level

"This is not real magic," I said. "This is some kind of fanfiction gone rogue."

Rika laughed. "Call it what you want. The stronger the connection, the stronger I get."

"And my brain melts a little more each day."

She leaned on the windowsill. "You're handling it well."

"I'm not handling it."

She reached forward and flicked my forehead.

"You're cute when you're panicking."

Then she held out her hand.

"Touch boost before bed?"

"Minimum contact."

"Pinky swear."

I sighed and held out my hand.

She took it.

The familiar glow wrapped around us. Warm. Strangely comforting.

No jokes this time.

Just silence.

And then—

Her chest glowed again.

"DID YOU JUST LEVEL UP AGAIN?!"

"Maybe~"

I slammed the window.