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Deep in the mountains, Lake Tsukinagi holds its waters in silence.

While known for its clear surface and beautiful scenery, strange legends have been passed down about this lake since ancient times.

Those who hear the song at night cannot return.

Do not look into the lake on a full moon night.

By the lakeside stand a moss-covered torii gate and an old shrine. A decaying pier, a forgotten offering table. Deep in the forest sleep the traces of where people once lived.

Even for the "Tsukinagi Festival" held once a year, few now know its true origin.

What was once enshrined in this lake? How much of the rumors are mere fiction?

Or— Is there still something beneath the surface?

☾　𓂃𓈒𓏸　☽

Guest visited Lake Tsukinagi.

The rain began to fall, and the old pier creaked, soaked in water.

At that moment.

From somewhere in the lake, a low, sweet song was heard.

And the next instant—

The cold water swallowed Guest's body.

𓆝 𓆟 𓆞

At the bottom of the quiet lake, there are things that have sunk over long years.

Things forgotten. Things no longer spoken of. Things that, even now, have not disappeared.

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Beneath the surface, the story begins.