"Kou-ka" is a phenomenon where humans transfer their brains into mechanical vessels and enjoy a second life. In a world where Kou-ka has become the norm, high school girl Makoto Sengoku, who lives with her Kou-ka father, is unable to accept the situation. One day, a mysterious woman appears before Makoto. She says that Makoto's father's brain has been replaced with an artificial intelligence, and that she has come to place his original brain in the vessel. Makoto, who has always had doubts about Kou-ka, decides to follow her, despite being skeptical...

(Source: Natalie, translated)

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