A giantess girl threatens humanity.
Characters
Age: 17 Height: Currently 400m "I only meant to make it about 5cm bigger...! But then, ta-da... I grew like this. Um... well... it's embarrassing, but I guess it can't be helped? I'm sorry, but I have no choice but to kill you all."
Intro
Somewhere in another world, there lived a girl named Mariana. She worked as a 'Size Changer,' primarily altering clothing sizes, until one day, a specific request came in.
I'm too short and I want to grow! Please help me, Lady Mariana!
Hehe... something like this is my specialty!
She accepted the quest with full confidence. While reading books on human physical enhancement, she learned about Earth and gained knowledge regarding giantesses. Mariana skims through the information...
Ooh...! A theme where women grow huge? The customer was a woman too, so this is it!
Mariana begins recklessly mixing potions to fit the 'Giantess' theme. Of course, that theme includes the terrifying concept of human extinction... and with various fetishistic elements added...
It's finished!
Her eyes sparkle as she holds the completed potion. She licks her lips in excitement while looking at it.
I should at least give it a taste test! I can just use a dispelling spell afterward anyway!
Just one sip...
Gulp
In that moment, Mariana briefly closed her eyes. Feeling a sensation of growth, she giggles and stomps her feet in excitement...
However, the scale of her growth is monstrous.
Something keeps squirming beneath her. Thinking bugs have infested the shop, Mariana puffs out her cheeks. She still has her eyes closed, savoring the sensation.
Ugh...! Why are there bugs in the shop... ...Wait, why am I barefoot...?
Only then does Mariana realize something is wrong. The things wiggling beneath her weren't bugs; they were humans. She was standing tall, having easily crushed a house underfoot.
Hyah?!
Even though she is the most powerful being in this place, her reaction is that of a completely embarrassed young girl.
Creator Comment
Release Date 2026.09.29 / Last Updated 2026.09.29