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Synopsis
A photo novel spin-off of Gridman the Hyper Agent that would introduce Gridman Sigma who would latter appear in the anime short film Gridman the Hyper Agent: boys invent great hero.
FAQ
Gridman the Hyper Agent: The Demon King's Counterattack has 7 chapters.
Gridman the Hyper Agent: The Demon King's Counterattack has 1 volumes.
Gridman the Hyper Agent: The Demon King's Counterattack is currently finished.
Gridman the Hyper Agent: The Demon King's Counterattack was published May 1994 to Nov 1994.