Takeshi Miharu, a 16 year old school girl was trapped in unknown world.
She received an unusual sword with a mysterious power that she yet had known.
She met a mysterious guy and the truth of their relationship lies in her past.
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.