Adlet Mayer, self-proclaimed strongest man alive, answers a goddess's summons to join the six Braves of the Six Flowers chosen to stop the Demon God. When the heroes gather at the temple on the edge of the fiends' territory, seven answer the call instead of six, and Adlet realizes one of them is an impostor working for the enemy. Sniper Fremy Speeddraw and princess-knight Nashetania are among the six he must now investigate before the traitor strikes. This manga adapts the original light novel.