Nishiura is Aki's father and a game developer, his demanding career often consuming his time. His company's globally successful mobile game bears profound personal significance: it integrates the "Magie der Glückseligkeit" (Magic of Bliss) created by his deceased wife, Naos. This integration stands as a tribute to her memory and legacy. He remains unaware that incorporating her magic into the game unleashes significant unforeseen consequences affecting both the human and magical realms.

His intense professional dedication springs from a desire to honor his wife through his work. The game becomes a vessel for her essence, reflecting his unresolved grief and commitment to preserving her influence. This act inadvertently bridges the two worlds, igniting the central conflict. The narrative explores his role in the resulting interdimensional disruption caused by the embedded magic.

Resolution requires him to face the consequences of integrating his wife's magic into the game. His story arc concludes by reconciling his tribute to his wife with the imperative to restore balance between the realms.