Rail, the imperial knight captain of the Razard Empire, finishes his mission and heads to report to Emperor Reise.
Her childhood friend, Pope Milena of the Holy Kingdom of Bardione, appears there.
The two decided to fight the representatives of each country to decide "which country is stronger".
Rail, chosen to represent the empire, will embark on a battle journey with another representative, Miseri.
Encounter with strong beautiful women grows a man named him.
Also, can they overcome the mysterious mutant enemy?