Help I Reincarnated in Genshin and Ganyu Keeps Feeding Me Coconut Milk

"If I had the choice, I think I'd grow up in an instant," Ganyu said softly. "But… growing up means sometimes you miss being little."

Xu Zheng nodded thoughtfully.

But deep down? He was done being little.

He had the mind of a grown man—hell, the soul of Cao Cao—trapped in the stubby body of a five-year-old.

It was a tragedy. A cosmic joke. A crime against testosterone.

Honestly, being this small was getting old.

Couldn't cook without a stool. Couldn't reach door handles. Had to be carried or led around like a toddler…

Okay, that part was kind of nice.

Still, Xu Zheng had made up his mind:

It was time to level up.

Just to prep for the inevitable hunger crash after using the growth serum, he decided to check inventory.

"Hehe… Master, I haven't had any coconut milk lately. We still got a bunch saved up, right?"

Ganyu blushed.

She had been meaning to bring this up, but he beat her to it.

While they'd been apart, she had diligently saved her milk in bottles.

Now… she had plenty to give him.

"Y-yeah… I've saved a lot for you."

"Perfect. Oh, and Master—just a heads up—I think my body's about to grow again."

"Grow?" Ganyu blinked, confused. "You mean…?"

"Yeah, I mean grow grow. Like, puberty speedrun."

She'd picked him up as a literal infant. Then, overnight, he'd suddenly become a kindergartener.

And now he was gonna morph again?

Sigh. Her cute little disciple was about to stop being cute.

But then again… maybe it was just a unique racial trait?

Yeah, that was it. No need to overthink it.

"Then… I'll prepare more coconut milk," she mumbled.

"Thanks, Master! Mwah!" Xu Zheng leaned in and kissed her cheek with his big sparkly eyes.

Ganyu's face flushed pink on contact.

He smirked inwardly.

Still this easy to fluster. If she reacts like that to a peck now, imagine what'll happen when he holds her hand at six feet tall…

By nightfall, ten full bottles of coconut milk stood in front of Xu Zheng like holy offerings.

He chugged five bottles in one go and let out a milky burp.

The rest, he'd save for later.

He knew the hunger was coming. It always came after using that growth item.

Sure enough, not ten minutes later, he was starving again.

One by one, the remaining bottles went down like shots at a frat party.

Then—thud. Out cold.

Apparently, "sudden nap" was a side effect too.

Early next morning.

"AHHH!" Ganyu's scream jolted Xu Zheng awake.

"Huh? What happened, Master?"

Xu Zheng rubbed his eyes. His brain was still in sleep mode.

Then he looked down.

"…Oh, shit."

He'd grown again.

The pajamas he went to bed in were now little more than tattered cloth confetti around his feet.

His body had expanded overnight—and in doing so, pulled a full anime-style clothes explosion.

To make it worse, Ganyu had stayed beside him all night.

The scene was… intense.

Let's just say, nothing technically happened—

But the implications? Rated R.

Ganyu covered her face with both hands, peeking through her fingers with suspiciously wide gaps.

"You… you don't have any clothes now. What are we gonna do?"

"Okay first off—no, I'm not wearing a dress. Don't even think about it.

And second, close those fingers tighter if you're gonna pretend not to look."

Xu Zheng's hair had grown too, now long and tousled in a teen idol sort of way.

Ganyu, thwarted in her "accidental" girl-dress fantasy, dug through her closet for a measuring tape.

Unfortunately, while rummaging…

Something fell out.

A small leather whip.

She froze.

Snatched it up lightning-fast and stuffed it back into the closet like her dignity depended on it.

Xu Zheng stared at her, mouth slightly open.

He almost said something. Almost.

But then decided: no. Privacy matters.

After all… Master's a 3000-year-old single woman.

A few quirks were only natural.

…Probably.

He tried not to think about the durability rating of that whip.

Ganyu handed him the measuring tape, her face glowing red.

The whip was actually an accessory she'd seen in a light novel and bought on impulse.

Totally academic, of course.

"…Why aren't you measuring?" she asked.

Xu Zheng raised an eyebrow. "Master, I can't measure myself. If you want the real numbers, you'll have to do it."

"Me? I-I have to?"

"Yeah," he said, smug. "Come on. Ravage me."

"???"

Ganyu stared at him in alarm. She just wanted to know his height and waistline.

Why did it sound like he was inviting her to dominate him?

Xu Zheng, now wrapped in a modest blanket around his waist, stood on the bed expectantly.

"…Fine."

She sighed, indulging him with a doting smile.

Who else would take care of him, if not her?

She stepped closer, slipped off her shoes, and padded over on cute little black-stockinged feet.

Then, moving behind him, she started with his chest.

Xu Zheng had grown into a 15-year-old boy.

His height even edged out Ganyu's now—a proper pretty boy.

Since his torso was bare, Ganyu's fingers inevitably touched his skin.

Her cheeks lit up like a bonfire.

This was… very new for her.

By the time she was done, she let out a long breath and fought off the strange desire to tie him up and use that little whip.

Ugh! Her disciple was unexpectedly adorable AND hot now!

"I'll go buy you some clothes. Don't leave the house."

"Got it."

Xu Zheng nodded and immediately went scrounging around for food.

Still hungry.

On the way out, Ganyu hesitated.

Something gnawed at her.

She was leaving a teenage boy, alone, naked, and increasingly handsome… in a house that was regularly visited by Yanfei, Xiangling, Keqing, Eula, and Baiwen.

The kind of setup that always triggered scandalous light novel plots.

She stopped. Turned around. Stormed back.

Locked the door behind her.

Then hung up a sign: "No One Home."

Now she could shop in peace.

Ganyu rushed into the first clothing store she saw.

"Ganyu, ma'am?" the shopkeeper blinked in surprise. "What an honor! You shopping here must mean you trust our brand!"

He lit up like a discount Christmas tree. "You're just in time—our new dresses just arrived!"

Ganyu shook her head.

The shopkeeper paused, then changed gears instantly—professional instincts kicking in.

"We've also got children's clothes in the back!"

"No," Ganyu said. "I need men's clothes. About this size."

She handed him the measurements.

"Of course!" he replied smoothly.

Then blinked.

Wait… men's clothes? Ganyu? These measurements…?

Definitely not hers.

Her waist was tiny.

Then who…?

"This one's nice," he said, holding up a stylish outfit that would fit Xu Zheng's frame perfectly.

Ganyu's eyes lit up.

Her disciple was gonna look so good in that.

The shopkeeper, meanwhile, was going feral on the inside.

Wait a minute. Ganyu… is buying clothes for a 15-year-old boy?

Ganyu nodded sincerely. "Yes, that's just about his age."

Oh.

OH.

The shopkeeper's gossip sensors went into overdrive.

Ganyu liked younger men?!

Teenage younger men?!

It didn't take long before the Liyue fashion world was abuzz.

Ganyu—the prim and proper secretary of Yuehai Pavilion—had been seen buying men's clothes.

For someone fifteen.

Who was the lucky boy that caught her eye?