Ep. 1: The Kirihara brothers awaken a new Night Head linked to unused brain capacity

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It is stated that seventy percent of human brain capacity remains unused and possesses incredible power, a phenomenon known as Night Head. A new Night Head is on the verge of awakening. This emerging power belongs to the Kirihara brothers. The narrative introduces this concept as a significant development involving these specific characters and their latent abilities. The source material from Amazon Prime Video highlights this awakening as a central element of the episode's premise.