Centuries after monsters emerged from spatial rifts threatening humanity, the Federation distributes ten blank magic cards to each high school senior to train Cardcasters. Ethan, whose father is ill, faces pressure to sell his cards for money, but refuses despite a lucrative offer. During the card drawing, others complain about drawing only common cards, but Ethan surprisingly pulls a Heroic Summon, a Steel-Bristled Boar, triggering the activation of a mysterious Godlike Gacha System granting him MAX Card Drawing Luck. As others mock his low draw chances, Ethan prepares to prove them wrong with his unexpected advantage.