Katte ni Kaizō

Katteni Kaizō is a Japanese manga series written and illustrated by Kōji Kumeta. It was serialized in Shogakukan's Weekly Shōnen Sunday from May 1998 to August 2004, with its chapters collected in 26 tankōbon volumes. An original video animation (OVA) series adaptation produced by Shaft was released from May to October 2011.

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