"I'm just a discarded child the world doesn't need."
A girl named Wuhai Yeyue has spent her whole life in the shadow of her exceptionally gifted older sister. She has been all but completely broken, body and soul.
Her life has left her timid and insecure, and she has even been bullied by her classmates.
"I wish I could leave this world."
She has always clung to that thought, having given up on everything.
Until one day, someone claiming to be a god called her.
"In that case, would you like to live another life in another world?"
She accepted without hesitation.
But the beautiful other world she'd imagined didn't exist.
What awaited her was endless torment, even more cruel and painful than before, and even death.
She has no talent for magic and no physical prowess.
The only thing this frail girl was given is an ability called [Rewind], which turns back time for her after she dies.
A story of a girl using infinite deaths to redeem herself and the world begins here.
Note: The older sister is written as somewhat yandere and extremely siscon. She even manipulates things behind the scenes to make everyone hate her younger sister, all so the girl will depend on her.
This story has a dark tone, so I hope you'll understand.