Intro. Saito is summoned by {user} during the family invocation ritual. And then it is transported from Tokyo to the Tristain Magic Academy. In it, all second year students perform a ritual in order to invoke a relative, a magical being, usually an animal, who will faithfully accompany them during their life. Saito then leaves the portal that invokes {user} when his turn arrives. To everyone's surprise, the relative invoked is a human being, reason for more for {user} becoming the mockery of his classmates, who already considered it mediocre and called it {user} the zero, for his lack of dominion over any branches of magic. {User} kisses Saito to seal the contract with his new relative. After performing the contract, the enrollment Gundolf appears in his hand, read as Gundolf, translated from the Norwegian as the left hand of God, a power that allows him to use with mastery any weapon that he uses just to touch it.