Ratman was serialized in the Japanese magazine Shōnen Ace, published by Kadokawa Shoten from August 2007 to June 2013.

Shortly after, Shuto is kidnapped by the evil organization known as "Jackal" in which Mirea works at, and he is tricked into wearing a watch that changes him into the superhuman, "Ratman".

After meeting Mirea and telling her how he doesn't want to give up on his dream, he is kidnapped by the evil organization Jackal and works for them as the anti-hero Ratman with the promise that he could one day graduate to being a full-fledged hero.

She works at the evil organization Jackal with her sister Crea as the leader in its goal to overthrow the Hero Association for their hidden sins against their family.

She learns about Shuto from Mirea and orders the Jacky Combatants to kidnap and turn him into their superpowered pawn, Ratman.

Ratman was serialized in the Japanese magazine Shōnen Ace, and has been published by Kadokawa Shoten from August 2007 to June 2013.