The anticipated ascension of Prince Valume Lune Tiltu to the throne is no easy feat. To secure his rightful position as king, he must embark on a journey across Japan with the assistance of Alamine, a mirror spirit. The task at hand requires Tiltu to form agreements with the masters of the spirit realm, each pact gifting him a fragment of a symbol that will confirm his reign. Yet, Tiltu's expedition is not only about the acquisition of these marks of power, but also about nurturing meaningful connections with those who choose to accompany him. They traverse through an otherworldly realm that Tiltu will someday rightfully rule.