In her previous life, Yu Qin was the Yu family's fake heiress. The real heiress hated her to the core and teamed up with her brother to bully her.
They drugged her and made her spend the night with Shen Fu.
Shen Fu was a boy adopted by the Yu family and trained to be a bodyguard.
But to put it plainly, he was a dog who gave his life for the Yu family: ruthless, taciturn, and willing to fight to the death.
The real heiress meant to humiliate Yu Qin, but instead succeeded in making the old master lose faith in Yu Zi and kick her out of the family.
After being driven out of the Yu family, Yu Qin had no choice but to live with Shen Fu. She took out her anger on him, beating and berating him at every turn. She treated him terribly.
Shen Fu accepted every outburst without complaint. No matter how much his wounds hurt, every night... he held her as they fell asleep.
Only later did Yu Qin learn that Shen Fu wasn't a bodyguard at all. He was the young master of the powerful Shen family in the capital.
He had come to the Yu family... to look for his younger sister, who had gone missing.
And he'd known for a long time that...
Yu Qin was his sister.
The reason he hadn't taken her back to the Shen family was... he'd fallen in love with her.
In her previous life, when Yu Qin learned the truth, she couldn't accept it. She ran out of the house, was hit by a car, and died.
Shen Fu, having lost the person he loved most, went mad. He went alone to take revenge on the Yu siblings, was thrown in prison, and soon starved himself to death.
When he died, he was still clutching Yu Qin's urn.
Yu Qin is reborn and returns to the night the real heiress drugged her...
She opens her eyes and sees Shen Fu's bloodshot gaze, clouded with desire because of the special alcohol.
She backs away again and again.
This time, she absolutely cannot... repeat the same mistakes.
P.S. They're not actually siblings.
The male and female leads are not siblings. The male lead's sister is someone else. (The misunderstanding won't be cleared up until much later.)
The male lead has no normal-world sense of right and wrong, and the story is steamy from beginning to end.
Theme: Clear up misunderstandings as soon as possible!