Kikkai tai Omorai: Kasu Tougi Sekaiichi Ketteisen

Includes one extra chapter and two side stories: Kikkai tai Omorai - Kasu Tougi Sekaiichi Ketteisen (キッカイ対オモライ カス闘技世界一決定戦) Omorai-kun 2001 (オモライくん2001)

Maka Kikkai is an elementary school student who calls himself a handsome boy on the cutting edge of scientific civilization. He tries to live a comfortable and convenient life with the help of his tutor Mashin Hakase's, and his father's inventions, but he always fails and causes a big ruckus. Note: Chapter and volume count is based on the 1973 Sun Comics edition which was the first complete compilation of the series