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Ratman (ラットマン, Rattoman) is a Japanese shōnen manga written and illustrated by Sekihiko Inui. The series follows the story of Shuto Katsuragi, a wannabe hero, who tries to save his friend, but ends up becoming the "villain" Ratman. Ratman was serialized in the Japanese magazine Shōnen Ace, published by Kadokawa Shoten from August 2007 to June 2013.