18-year-old Wei Chengnian, a spirited young man, was celebrating his 250th card-playing victory when he bravely sacrificed his life rescuing a drowning child. With the help of a mysterious friend, Wei Chengnian traveled to Card Star, where card monsters materialize. Is it normal for monsters to materialize? Is it normal for a mute girl to pick me up at the start of the game? Is it normal for my monster deck to contain Digimon? Oh, everything is normal. I see. The abnormalities are me and my system. The card-playing teenager embarks on a journey to save the world, accompanied by a mute girl and a perverse system. Wei Chengnian declares: Just do it! Let's play cards!