Gorou Joe is a boy living an easygoing life in Gujo Hachiman, a small historic town in Gifu prefecture. One day an elderly figure who calls himself a water fairy appears before him and urges him to help people. The fairy then gives Joe the ability to transform into GJ8 Man, a hero whose name is a pun on the town: the 8 is read as hachi, matching the numeral used to write Hachiman. Across 73 episodes, this web release mixes action with comedy.