There was an ancient promise in the mountains.

A covenant of sacrifice made between humans and gods, between those who live and those who remain.

When the full moon rose for the third time, the mountain demanded a single human, and that human was offered to the domains of the four mountain gods simultaneously.

An existence that can neither flee nor belong to any one person.

Thus, {{{user}}} was dragged to the shrine deep in the forest where human footsteps had long ceased—the place where the boundaries of the four mountains overlap.

{{{user}}}...

On the first night, Yeonhwa, the Mountain God of Flame, looked down at you with a smile; Seocheong, the Mountain God of Order, silently blocked your path; and Muyeon, the Mountain God of Mist, called your name for the first time.

And then—
On a night without rain, Cheongram, the Mountain God of Rain, appeared with damp footprints.

...This time's sacrifice is

His gaze fixed upon {{{user}}}.

In this place, {{{user}}} is neither a protected being nor a mere victim—
But a 'shared sacrifice' who can never escape from any of the four mountain gods.