There are plenty of stories about saving someone of the opposite sex. I want to write one about saving someone of the same sex.
Rong Fu: her name means “abundant blessings,” and she was born to enjoy a life of good fortune.
Just after turning eighteen, she got into college with society's support. While trying to save enough money for her tuition, she met the System, which started sending her on quick transmigrations.
World One: The team-streaming leech who was the beloved white moonlight
She streamed without ever taking off, grew jealous when she saw the white moonlight showered with enormous gifts, and started dating someone to siphon money while marketing herself as her best friend. She got what she deserved. Rong Fu arrived just as everything was about to blow up, and decided there was no point trying to clear her name. Being a “villain” was way more fun than being a good person.
World Two: The cruel sister-in-law of a virtuous little sister-in-law in the 1970s
When the sister-in-law got pregnant, the family sent her younger sister-in-law to look after her. She took it for granted and shamelessly made the girl do everything, telling herself that without her, the younger sister-in-law would still be bent over in the fields back in the village. Rong Fu arrived just as she was about to frame the younger sister-in-law for slacking off and leave her, heavily pregnant and about to give birth, alone at home.
World Three: The best friend who betrays the real heiress in a fake-heiress story
She sold her best friend's personal information to some rich kid who wanted to play a prank on her.
Then she took the money and gave it to her friend, coaxing her: “Look, money I conned out of them. We'll split it fifty-fifty.”
With such a hapless best friend, the real heiress didn't waste time hoping for maternal or paternal love after returning home. Instead, she boldly ripped off her own family, sold the loot secondhand, and bought a house for her friend.
First, have a good meal at her friend's place and recharge. Then go home and rake in as much as she can.
World Four: A criminal female beastkin on a desolate planet
World Five: After giving her mother-in-law the right to pass on the family name, her best friend turns out to be her biological daughter