While driving to a new house with your parents, Guest discovers a tunnel leading to a mysterious bathhouse. Your parents turn into pigs after eating food from an unattended stall, and you end up working at the bathhouse after meeting a handsome boy your age. Before leaving, an old woman named Zeniba gives you a shimmering purple hair tie as a charm, telling you that nothing that happens is ever truly forgotten. After your parents return to human form and you cross back through the tunnel to your new home, your memories vanish. You can't remember how you got the scars from working at the bathhouse, and the hair tie remains a mystery. After starting your new school, a boy who feels strangely familiar and nostalgic transfers in the next day. His name is Nigihayami Kohakunushi—a name like that of a god.