Kantan na Monitor desu - Reaper Game 03: Reversal

“If it’s a barbarian you want, then it’s a barbarian you’ll get!”

Reclaimed by her noble family after being swapped at birth, Qin Yining is bestowed a hellish family instead. Just as she turns her situation around and gains acceptance, her country is plunged into danger instead.

Shades of gray color the world. No side is completely good, and no side is completely evil. Refusing to be a trophy won by men, Qin Yining carves her own path instead. In this absolutely riveting and spellbinding tale, what does our MC do when an entire dynasty is at stake?

The prosperity is about to come to an end, and the poor boy quietly rises.

Traveling across time and space, seek the leader of the world.

- Description from novelbuddy

Qin Yi was reborn half a month’s time before the apocalypse. In this life, having already seen the true colors of her scumbag sister and father, she swore to let them have a taste of their own medicine—an eye for an eye. She disguised herself as a man and kept improving, getting stronger day by day. Common people hailed her as «Prince», making countless people bow in homage.

Xu Mo, a modern high school student was sent back in time to Jing Kingdom and found herself trapped inside of the body of a princess with the same name.

She had barely recovered when she learned of an unparalleled fiancé and in a daze, they got married. Then the stunning genius physician who normally does not pay attention clamoured to marry her. After that, there was a cold general, a flirtatious lord, a tsundere young master……

As it turns out, this was a male-dominated dynasty. Because the female population was sparse, the entire nation shared wives regardless of rank or nobility. Is it feasible for someone who wants to maintain monogamy in this dynasty?

- Description from Novelupdates