"Mmm…"
Sunlight filtered in through the window, scattering warm summer light across the room.
Yellow frowned slightly and slowly opened her eyes.
Staring up at the unfamiliar ceiling, she froze for a moment—then suddenly sat up in shock.
"W-Where is this?!"
She looked down at her disheveled clothes. Instinctively, she wanted to scream—until she saw who was sleeping next to her.
A woman so breathtakingly beautiful that Yellow was left speechless.
The incredible curves beneath the thin summer quilt made the flat-chested girl feel an intense, uncontrollable envy.
Yellow turned her head to glance back at her own perky butt, confused as to why it seemed rounder and bigger than even her own chest.
She carefully got out of bed and tiptoed to the living room.
"Big Brother? Are you here…?"
It was strange. She hadn't even asked Ace's real name, yet she had somehow willingly given everything to him… to the point she still felt it had been a dream.
"No one… Is that auntie Big Brother's mother?"
She muttered softly as she headed to the bathroom.
She badly needed to pee.
But as she lifted her dress, she froze.
"This… what is this…?"
In the mirror, Yellow stared at her lower belly.
A strange heart-shaped charm mark glowed faintly.
"S-Such an embarrassing pattern…"
Her cheeks burned bright red, and scenes of Ace bullying her in all sorts of ways instantly filled her mind.
"Buzz…"
The charm mark flickered.
Her previously flat chest trembled—then began growing into a small, budding curve.
"Eh…? H-How… how can this be…?"
Yellow's eyes widened. Her butt looked even perkier too.
Worse…
Her hand slid down her belly on reflex.
Her light yellow eyes clouded over with mist.
"I suddenly… miss Big Brother so much…"
Just as she was about to continue something shameful, the bathroom door opened slightly—and Delia walked in wearing a nightgown.
"You must be Yellow, right?"
"Eh?!" Yellow jerked her hand away instantly.
Her flushed face turned into full-blown panic.
"I-I am! H-Hello, Auntie!"
She bowed too fast.
Her loose pants slipped to the floor with a loud thud.
"Ah— ah— ah—!!"
Mortified, Yellow flailed in panic, using her hands to cover herself and looking left and right for someplace to hide.
"Pfft…" Delia chuckled lightly.
"It seems Ace brought home a cute little sister~ Don't worry, I won't bother you. I'll wait outside."
"O-Okay…"
After Delia left and closed the door, Yellow sat weakly on the toilet and let out a huge sigh of relief.
Thinking about Delia's gentle smile, she whispered.
"Auntie is so gentle. But… Big Brother's name is actually Ace…?"
Her face turned pink again as she pressed her hand to her belly.
"It suits him."
Outside, Delia sat on the sofa, thinking deeply about the charm mark on Yellow's stomach.
It was identical to the one on her own body.
"Ace… he…"
A slight pain flickered in her heart.
But only for a moment.
In many regions of this world, family systems, royal clans, and city-states still existed. For capable men, having multiple wives and lovers was hardly unusual.
Even Gary had seven or eight girlfriends at once.
"Perhaps I should help my little man manage these relationships properly."
A small gleam flashed in Delia's eyes.
"Auntie, I'm done~" Yellow stepped out, cheeks still pink.
She already assumed Delia was Ace's mother.
"Here, this is what Ace left for you. You must be hungry, right? I'll start cooking~"
Delia handed her a folded note and walked toward the kitchen.
This note had been placed beside Yellow's pillow. Delia had one too.
From it, she learned that the girl's name was Yellow.
"Thank you, Auntie."
Yellow bowed and opened the note.
'Yellow, I am your Big Brother, Ace. I'm very happy I met you in Viridian Forest. I need to confess something. I actually wasn't injured.
I just wanted to taste Yellow inside and out~ And it went exactly as I thought. Yellow, your whole body tastes so sweet…
Especially when I broke into your—'
"Ying—!!"
Yellow slammed the note shut, face burning.
She checked left and right to make sure no one saw.
"Big Brother… is such a pervert…"
Her legs tightened slightly under her skirt.
After a long breath, she opened it again.
'The owner of this house is named Delia. You can think of her as a gentle person like a mother. She, like you, is one of my favorite girls.
If possible, I would like you to live here too. That way, I can taste Yellow anytime I want.'
"So her name is Auntie Delia…" Yellow blinked.
"So 'same as me' means… Big Brother Ace and Auntie Delia are together? But… Big Brother said I'm his favorite girl."
She held her small face in her hands, smiling sweetly.
She didn't know what love was but Ace's words alone made her heart flutter.
"Finished reading? Come, try Auntie's cooking."
"Okay, Auntie Delia. Thank you for your hard work."
"You're welcome~"
"By the way is Big Brother Ace not coming back for lunch?"
"He… he'll be at the summer camp for the next two days."
They continued talking, becoming more and more comfortable with each other.
[Ding! Host fed Nanami a large amount of pure essence while she was unconscious, gaining +200 pervert points!]
"Slurp…"
Ace held Nanami's head as he slowly pulled away.
Her cheeks, once pale from fever, now glowed rosy and warm.
Ace couldn't help admiring the power of pure essence.
With lubrication, everything afterward would be easier.
He lifted the thin quilt and peeled Nanami open layer by layer revealing flawless white skin.
"Sister Nanami is really beautiful…"
He leaned down and kissed her softly. Nanami, eyes shut tight, flushed deeper.
Ace smirked.
He'd just realized something.
Someone was awake just pretending to sleep.
He didn't rush. Instead, he teased her little by little.
"Strange… Why is it so wet already? Does that happen when you sleep? Honestly, Sister Nanami is both hot and slutty."
The words stabbed straight into Nanami's heart and body at the same time.
Her breathing grew faster and faster.
Finally after Ace once again failed to push inside—
Nanami suddenly opened her eyes, face red, and snapped.
"Stinky Ace… hurry up!"
"Eh?? Sister Nanami, you weren't asleep?" Ace grinned wickedly.
"Hmph~" Nanami didn't answer.
She wrapped her legs around him, pulling him close, her big eyes narrowing.
"You're back… I missed you so much…"
And as she whispered it—
Her body sank.
"Haaang~"
...
Author's Note:
Part 1 of Pokémon: Oops, I Accidentally Became Invincible has now been fully completed with more than 80 chapters released!
I've also shared some 18 plus lite bonus chapters for the series on my Patreon. If you enjoy the story and would like to support future releases, feel free to check them out and enjoy the extra content.
One complete 18+ novel has been uploaded on Patreon, guaranteed to give you an intense and thrilling experience.
🔥 I also have a Doraemon 18+ fanfic with smut content available for readers who enjoy exclusive mature stories. 😉
If I receive enough support from readers—more views and engagement—I'll start posting weekly bonus chapters instead of monthly ones.
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Thank you all for the support and enjoy the chapters! 💙🔥