High school student Lin Chenxi and her older brother Lin Chenxu have always depended on each other. She has lived cautiously [though not that cautiously, considering she even fights in illegal boxing matches], until the trouble she gets into after standing up for someone lands her in the sights of a gang boss's daughter...
[Socially clueless, but willing to learn how to be a person and practice on her brother first] younger sister Lin Chenxi x [with a devoted-husband vibe, but habitually throws his sister under the bus; a clean-freak sister-complex] older brother Lin Chenxu
After an illegal boxing match, Lin Chenxi returns to work at the bar and finds a new coworker who's a bit of an idiot.
Back home, Lin Chenxi says, "Bro, the new person at the bar thinks I'm a guy."
Lin Chenxu slaps his thigh and laughs, then Lin Chenxi gives him a hard pinch, and he lets out a truly heart-rending howl.
Just recovered from a concussion, Lin Chenxi returns to school and answers a call: "Dear little sister, I rescued a problem. Do me a favor and help me deal with it!"
Lin Chenxi: "What problem?"
Lin Chenxu: "You'll see in a minute."
Lin Chenxi: "Is this how you throw your own sister under the bus?"
Lin Chenxi angrily hangs up.
Though they complain about each other to their faces, these siblings cover for one another. When they run into siblings who really will stop at nothing, and a father who keeps making the same mistakes, getting thrown under the bus is the only option...
[After Chapter 19]
Lin Chenxi swaps souls with a young, spoiled nobleman from ancient times (his story from a previous life appears in the historical installment of the Sighing Through the Long Night series). The nobleman's soul enters Lin Chenxi's body, and from then on, Lin Chenxi loses all her memories.
Meanwhile, gang leader Zhuang Ming goes to great lengths to have his men "pick up" this gifted boxer. But once he has her, he discovers that she's lost her wits, and her boxing skills are gone too. Just as the bargain he's gone to so much trouble to "pick up" is about to turn into a total loss, the free-flowing calligraphy in her biology notes catches his eye... What strokes, what style! Shouldn't he get her to write something and replace the "Heaven rewards diligence" plaque in his office?
But although this Lin Chenxi has lost her memory, she's not stupid (don't listen to Zhuang Ming, she's really not). Being kept cooped up all day, writing and writing, is no different from house arrest! Guided by the principle that "if people don't make trouble, Heaven will strike them down," Lin Chenxi watches the endless parade of "older brothers" around her, and starts putting her clever little brain to work...
[An amnesiac girl whose morals are as flexible as her wits] Lin Chenxi VS [a gang boss with hands and shoe soles equally clean] Zhuang Ming. How long can a sibling bond, bound by a guardianship agreement, last? And can the affection between biological siblings withstand amnesia?
Zhuang Ming watches Lin Chenxi point at her phone and ask his underling, "What is this?" Suspiciously, he asks, "Have you gone stupid?"
Lin Chenxi: "I haven't! I've just lost my memory!"
Zhuang Ming narrows his eyes, more certain than ever. "You're obviously stupid."
Lin Chenxi bristles. "I'm not!"
Zhuang Ming: "Then sign this agreement."
Lin Chenxi: "A 'Change of Guardian Agreement'? What's that?"
Zhuang Ming: "See? I told you you'd gone stupid! Look, look!"
The biological siblings, both suffering from amnesia, are brought together by their respective "representatives."
Lin Chenxu awkwardly edges closer. "I heard you're my little sister?"
Lin Chenxi nods awkwardly. "Uh, I guess... so?"
They fall silent, then both turn their heads away.
Of all the "older brothers" around her, Lin Chenxi has the worst impression of her actual brother. As for why, that all comes down to Zhuang Ming...
Theme: Those who deceive others will be deceived in turn.