The Lazy Noble Daughter Just Wants to Lie Flat

[Dual transmigration + switched marriages + lie-flat fish vs. overachiever]

Jiang Lanxiu, a corporate drone who worked herself to death on a 996 schedule, transmigrates into the body of a neglected legitimate eldest daughter, with a dead mother and an uncaring father. She decides to lie flat and live like a happy-go-lucky fish.

That is, until her favored younger sister, an overachiever to the death, switches their marriages, making Jiang Lanxiu the eldest young madam of a duke's mansion. Forced to bring her workplace survival principles back out, she treats her husband like her boss and helps him scout new employees... no, concubines. Once she has helped him promote a concubine to the position of legal wife, she'll resign, or rather, divorce him.

Her plan is sound. She waits and waits for her husband to earn a promotion and noble title, carrying her ever higher with him, but he never takes a concubine. Instead, he remains devoted to her alone.

Well... getting herself promoted to boss's wife isn't such a bad idea either.

Jiang Yuxiu, the second young lady of the Jianglin Marquis household, rose from a concubine-born daughter to a legitimate one through sheer hard work. Reborn in the year she was married, she has a second chance at life.

In her previous life, she used her father's favor and her mother's schemes to marry the legitimate eldest son of a duke's house. She thought she could ride the wind to the clouds, but her husband disdained her stunning beauty and never touched her again after their wedding night.

Even worse, after a border war, her husband returned paralyzed. She was left a widow in all but name, forced to care for him every day.

Meanwhile, her elder sister, who had married the concubine-born second son, enjoyed a happy and prosperous life, even taking the title and honors that should have been hers.

Reborn into this life, she is determined to change her fate!

This time, she chooses to switch marriages and waits for her husband to rise from a concubine-born son to a legitimate heir, then to win the military examinations in place of his elder brother, who is off to war. She plans to claim the glory her sister once enjoyed in her previous life.

But as she waits and waits, all she sees is her sister coasting to victory at every turn, living an even more comfortable and privileged life than before!