Let me shatter your fantasies with these fists!
A beautiful young girl with black hair smiles as she raises her little fist and smashes a boulder beside her. Then she thrusts out her chest and crushes another boulder with it.
"Sis... could you stop being so savage? You're ruining the image I worked so hard to create," a cute little voice in her head says helplessly.
The black-haired girl darkens her expression. "Wei Xiaoyun, I'm warning you. Don't use my body to flirt with men while I'm studying again, or I'll make you regret it."
Nearby, a passerby stares in utter despair at the boulder the gentle-looking girl just punched to pieces, then collapses to the ground like a puddle of mud, trembling in fear.
(...Why is my sister so savage?)
(Shut up!)
The story of two sisters, sharing one body and two souls, relying on each other to survive in this endless, cruel world (while beating the stuffing out of the locals).
P.S. Once an idea pops into my head, I just can't control myself.