Book publication confirmed!

From BK Books f,

On sale July 4th!

https://www.bunkasha.co.jp/book/b665648.html

The protagonist, Rei, was born as the eldest daughter of Count Saiga's family.

In this world where magic is everything, Rei, the only one without magical power, spent her days oppressed by both her family and those around her.

One day, by royal decree, her younger sister is to marry into the Ichijō family, a noble house in the Far East, a country across the sea.

However, her sister's new home is a land of monsters where terrifying yōma roam. Moreover, the head of the Ichijō family, Satoru Ichijō, was nicknamed "The Demon of the Far East."

Her doting father decided to send Rei to the Far East in place of his beloved step-daughter, Aerial.

Rei agreed, seeing it as an escape from her hellish environment, and crossed the sea.

"You possess tremendous spiritual power. It's magnificent."

In fact, Rei, who, in lieu of magical power, possessed immense spiritual power, came to be doted on by Satoru.

It was then revealed that Rei was the reincarnation of the Great Yōma, Zashiki-warashi.

Possessing the power to bring prosperity to any household she inhabited, she was a person the people of the Far East desired beyond measure.

Meanwhile, the Saiga family, having lost Rei, rapidly fell into decline.