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RDB: Red Data Book

Fourteen-year-old Kento Kimigawa lives separated from his stepfather after his mother's death. A woman visits with a will saying it is from his biological father. He refuses the will, yet she tells him the inheritance is approximately 1 trillion yen. Kernto still objects; however, with the jobs of his friend's family on the line, he agrees to meet his relatives. All is not as it seems: when he arrives at the house they are attacked, and he finds out the true meaning of the will.

(Source: MU)