A God Killed Me By Accident, But I Reincarnated As The 4th Son Of The Marquis - Chapter 64Volume 1 : You Contracted With Them!

The world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeating her.

As the current decade’s Hexennacht approaches, a mysterious girl named Kagami Kagami arrives and meets Horinouchi Mitsuru, the daughter of the previous Hexennacht representative.

It takes place between Kyoukai Senjou no Horizon and the City Series, two other series by the author.

The Empress who dies in torture, An Rushuang is her name. After she wakes up, she finds herself has time-travelled to when she was twelve years old, but she would turn into Major General’s white horse at night. He is a general who orders about the winds and clouds on the battlefield, and she is a little girl lives in her boudoir seclusively.
She endeavors to change her fate, and he spared no effort to win every battle. They meet each other every day, well, it’s night to be accurate. Is that a dream or not? She pleads to marry the seignior to win peace for her family, only to find he is the one she is going to marry.
“Growing old with you under the same roof is my long-cherished wish”, thought them both.

- Description from Novelupdates

Ella has the most perfect life. A life that everyone could envy her. She has a beautiful face, a beautiful body, abundant wealth.

The most important thing to her is that she has her someone that she thinks is her soul mate.

But a betrayal makes herperfect life shattered. She was lied to, toyed with and thrown into a much worse place than hell.

She was expelled from her family and locked up in a mental hospital, a place that shatter both of her wings.

Five years later, Ella returns with one goal in life. She handed over her body to Christian, a CEO who is notorious for being the cruelest.

In exchange, Christian will help him achieve his dream: REVENGE!