A devoted young man is betrayed by both the woman he loved and the older brother he trusted, leaving him on the brink of death at the hands of a monster.

As the weakest E-Rank Ability User, Lin Xiaomei's ability, 【Copy】, is considered worthless. Even after copying someone else's power, he can only wield it at 10% of its original strength.

But with his dying breath, he copies the very monster that nearly killed him—

A Succubus.

Reborn as the same kind of creature, Lin Xiaomei gains access to a succubus's unique abilities, allowing her strength to soar at an astonishing pace as she climbs toward the pinnacle of the world.

With her newfound power, she vows to take revenge on everyone who betrayed her, making them repay their debts a hundredfold and turning them into nothing more than stepping stones on her path to greatness.

Yet as her power grows, so too does her transformation.

She drifts farther and farther from her former self, becoming increasingly feminine, while the traits of a monster become ever more pronounced.

"A little skirt... it's so embarrassing..."

"What am I supposed to do about these horns...? They're going to poke right through my hat..."

Two years later...

"Hehe~ What should I wear for today's date? Black stockings, a slip dress... or maybe... something even bolder? ❤~"

"My tail really is useful~ I'll be counting on you again tonight. ❤~"