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Manako Amano is a professor of engineering at a leading university and has been studying “failure studies”. Rather than pursuing responsibility for failure, it is a study that helps to prevent recurrence by investigating the direct causes and the background and social causes. The various accidents that occur every day are always failures, and accident investigation is Manako's best fieldwork. Their activities go beyond engineering and spread with curiosity, such as corporate fraud and medical accidents. Personality is self-paced and selfish. He loves failure with the belief that “growth/progress will always be accompanied by failure” and frustrates the other party in order to shine his eyes on the failure story. However, the genius with a built-in failure database of east and west in the brain, Manako, reached the truth of the accident today!