In Mitono, a remote mountain village with only a handful of households, every child must undergo a mysterious ritual known as Warawa-Tomurai. Sixth-graders Yuuma and Honoka take part in the ceremony just before the village begins to disperse.

Yuuma’s family soon moves to the city, while Honoka remains behind due to unforeseen circumstances. Separated, the two begin to uncover the secrets behind the ritual.

Within the sanctum where something inhuman resides, the children are drawn in—toward a painful fate.

[From Steam]