The continent's largest kingdom, the Kingdom of Westphalia.

The boy Light who lived there had the lesson of the sword from his father who was a former knight of the kingdom, together with his childhood friend Lyrica and Sere.

Both Lyrica and Light being childhood lovers, promise to be engaged with each other. Sere also being in love with Light decided to be Light's mistress.

Because you have to be a knight to have a mistress, Light slaved himself to point of death in order to be a knight of the kingdom of Westphalia.

And, in order to receive the special ability called "gift" which everyone has, when Light, Lyrica, and Sere become 16 years old, they go to the cathedral of the Westphalia kingdom in order to appraise their "gifts".

However the cruel reality is revealed, when Lyrica and Sere both receive great gifts and Light receives a talent called "???"

An Unknown Power.

A man called Brave came from another world with two women and told both of the women:

"Are you the girls of my destiny?"

They were gathering girls with great gifts to combine their power and kill the Demon King that was recently revived.

Lyrica and Sera, together with the man called Brave and the two girls, journey together in order to kill the Demon King.

One year later…

Lyrica and Sere came back, as the wives of the Brave rage…

For the two of them, Light, which became a knight in order to marry them, is simply deserted.

Betrayed by both of his dearest Fiancés, Light, broken by sadness wandered aimlessly, weeping…

But his sorrowful emotions are killed soundlessly as anger consumed him… All of them… KILL!