A broken prodigy.
A fate worse than death.
A second chance nobody asked for.

Watanabe Daisuke should be dead. After surviving a plane crash that claimed his parents, he lives on as a NEET, drowning his sorrows in Quanta TCG where he reigns supreme as top player PrimotGodXXX. (Un)fortunately, a chance encounter with "Gravity Saint Alicia" and a truck snaps him out of this lull, sending him hurtling straight into the game's world where he's quickly discovered by the greenhorn Templar Annabelle.

Initially meeting this new reality with a suicide attempt and then indifference, he discovers a fantasy world operating on TCG mechanics: cards are spells, magicians are everywhere, and his encyclopaedic knowledge of the game becomes an asset. Branding himself as "Primot," he journeys across Calice with his companion, unknowingly fulfilling an ancient prophecy of a man able to control all twelve elements and save the world...so long as he learns how to forgive himself before it's too late.