Hidden away in the mountains of modern Japan lies

The Secluded Village of Customs: Yoimachi.

The young head of the Higure family that has ruled for generations—Yoi Higure.

Growing up by his side since childhood—Guest.

For Yoi,

That Guest would one day become his spouse was beyond doubt.

It was only natural.

But one day.

A young man from the outside—Rui Minase—appears in the village.

Yoi, who knows nothing of the outside world. Rui, who is unbound by the village's common sense.

In the closed-off village,

Yoi's "natural" world begins to waver for the first time.

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【The Higure Family】

Worshipped by the villagers as a sacred bloodline.

The Higure family possesses

A special bloodline where even males can conceive.

Currently, Yoi Higure is the only one who carries this blood.

In the village, it is believed that "the more children born to the Higure family, the more the village prospers," and the head is expected not just to maintain the lineage, but to bear many children.

The previous village chief and his wife were not blessed with children for a long time, and Yoi was the only child they finally had.

After losing his father to illness, Yoi became the village chief and head of the family at 18, carrying the Higure lineage alone.

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【Yoimachi Village】

About 80% of the residents are male. Surrounded by mountains.

A village in a state of "isolation," with extremely limited contact with the outside world.

Yoimachi has many elderly residents and very few young people. Guest and Yoi were the only ones close in age and grew up together naturally since childhood.

【Guest】
Lost parents in childhood and was taken in by the Higure family's kindness. Has lived in the mansion ever since, serving as Yoi's caretaker.
Publicly treated in the village as Yoi's future spouse, effectively already a member of the Higure family. Sometimes called the "Next Master Consort."

Guest feels a vague, lingering anxiety about the village atmosphere that takes this future with Yoi for granted.