This article is about a/an conditiion in Choushinsei Flashman.

The Anti-Flash Phenomenon effect which makes the Flashmen cannot drink a water in the Earth.

The Anti-Flash Phenomenon is a condition which affects natives of the Flash System after spending a certain amount of time away from the system, forcing them to return or else they would die. Hero Titan sucumbed to the Anti-Flash Phenomenon and the Flashmen were forced to leave Earth within a year lest they suffer the same fate.

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