"You mustn't look into the face of a Nameless child, as the eyes of a sinner will stagnate your heart—"

For Kirio, a boy living in the solitary valley village of Uruku, there was someone he wanted forgiveness from more than anything.
That person was Hakamori: a boy who, despite being born in the same village, was deprived of his name and exiled as a sinner.

Seeking his forgiveness, Kirio spent 5 years visiting Hakamori--however, one day, upon meeting a creature calling itself Jack, an unexpected turn in events ultimately occurs...