When the world falls into crisis, the Chosen Saintess summons her own Hero to keep the world from being destroyed.
Every hundred years, the Holy Church searches the various nations for Saintesses chosen by the gods, protects them from the Demon King's army, and teaches them sacred arts.
But the Demon King's army is no unchanging force. At the Demon King's command, this time they head directly to every nation, intending to destroy the sacred seeds in their cradles.
The hometown of the newly chosen Saintess, Xiabai, is destroyed. In her moment of despair, just as the legends foretold, she summons a being from another world.
But something seems a little different?
"I think you may have gotten something wrong. My name is Dias Regret, and I am the Demon King."
"Huh?"
This is a lie.