Life as a Royal's Breeding Partner - Chapter 4 – Problems With Being a Slave

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

A lonely soul, which was placed under the care of the Lord Protector’s Manor, ended up having her lover stolen by the family’s eldest daughter and dying tragically the day before her wedding.

Somehow, she was reborn in the family as their 14-year-old first wife’s daughter, Ning Xueyan, with a startlingly familiar face.

Step by step, she will ruthlessly scheme to seek revenge as well as uncover the mystery of her tragic death.

Her former fiancee, the flirty crown prince and the bloodthirsty prince, will now bear witness to a vengeful Ning Xueyan becoming the peerless lady of her generation…

- Description from Novelupdates

She was used by her boyfriend to trap someone. Unexpectedly, things did not go as planned.

Jiang Hao passed through ordinary people and was forced to be sold into the Demon Sect and became a disciple of the Demon Sect.

I wanted to cultivate with peace of mind to become stronger a little bit so that I could survive in the world of self-cultivation, but was “humiliated” by a female devil in every possible way.

There is a huge disparity in strength, and he can only endure the humiliation and survive, hoping not to meet each other again.

Without a backer, he was favored by the Demon Sect’s headmaster and was able to practice with peace of mind. When he became the chief disciple and met the headmaster, he was stunned.

Looking at the beautiful face of the other party, he couldn’t smile a little. Isn’t this the female devil?

- Description from novelbuddy